Re: Spray-on Conductive Coatings
UL Recognized Component Category QMRX2 covers parts and enclosures made from polymeric materials that are electroplated, metal foiled, hot stamped, painted, cathode sputtered or vacuum metalizzed. This category approves the combination of the coating applicator, coating thickness, plastic manufacturer and plastic material designation. In order to make life easier when obtaining UL or other NRTL approvals, I would recommend using coating applicators/plastics that have already been approved under this category. Regards Joe Martin EMC/Product Safety Engineer Applied Biosystems Doug McKean dmck...@auspex.com To: EMC-PSTC Discussion Group emc-p...@majordomo.ieee.org Sent by: cc: owner-emc-pstc@majordomSubject: Re: Spray-on Conductive Coatings o.ieee.org 01/11/02 03:02 PM Please respond to Doug McKean Darrell Locke wrote: Dear Colleages, We have seen an issue lately with spray-on conductive coatings used on the inside of electronic enclosures. The coating works great for EMC, but there seems to be a problem with adhesion and tiny flakes of conductive material getting in the electronics. I'm thinking that the spray-on type materials should not be used at all. Has anyone else experienced this problem? Try to avoid it if you can. You're absolutely right about the problem of flaking onto or getting into any energized electrical parts. Safety will be all over you about using it. And because of that, you'll have to get: 1. a UL approval for plastic of the cover, 2. a UL approval for the plastic molder who's making the cover for you, 3. a UL approval for the conductive coating, 4. a UL approval for the marriage of the coating with the plastic, 5. and a UL approval for the vendor applying the coating to the cover. All approvals have to be verified of course in black-and-white for approval and for all subsequent factory inspections with of course appropriate Certificates of Compliance handy as well. As far as emi, it's sort of a once used thing. Don't use it on a cover that will be repeatedly removed and replaced. It's not meant to be disturbed to any extent once in place. And do not use it as a primary ground either. And it's all dependent upon the thickness of the layers for effectiveness. Oil based coatings seem to have a higher ohms-per-square than the water based coatings. You want to keep it down around less than 0.5 ohms. Been there, done that, sorta don't want to do it again. Other personal experience mileages may vary of course. All strictly my own 2 cents worth of opinion. - Doug McKean --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server. --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc
Re: Spray-on Conductive Coatings
Darrell Locke wrote: Dear Colleages, We have seen an issue lately with spray-on conductive coatings used on the inside of electronic enclosures. The coating works great for EMC, but there seems to be a problem with adhesion and tiny flakes of conductive material getting in the electronics. I'm thinking that the spray-on type materials should not be used at all. Has anyone else experienced this problem? Try to avoid it if you can. You're absolutely right about the problem of flaking onto or getting into any energized electrical parts. Safety will be all over you about using it. And because of that, you'll have to get: 1. a UL approval for plastic of the cover, 2. a UL approval for the plastic molder who's making the cover for you, 3. a UL approval for the conductive coating, 4. a UL approval for the marriage of the coating with the plastic, 5. and a UL approval for the vendor applying the coating to the cover. All approvals have to be verified of course in black-and-white for approval and for all subsequent factory inspections with of course appropriate Certificates of Compliance handy as well. As far as emi, it's sort of a once used thing. Don't use it on a cover that will be repeatedly removed and replaced. It's not meant to be disturbed to any extent once in place. And do not use it as a primary ground either. And it's all dependent upon the thickness of the layers for effectiveness. Oil based coatings seem to have a higher ohms-per-square than the water based coatings. You want to keep it down around less than 0.5 ohms. Been there, done that, sorta don't want to do it again. Other personal experience mileages may vary of course. All strictly my own 2 cents worth of opinion. - Doug McKean --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server.
RE: Spray-on Conductive Coatings
It is best to use this process to avoid additional testing costs associated with using a non-UL approved coating or application process. Although these coatings can provide significant reductions in Immunity and Emission noise, they truly are a headache for safety approvals when regarding creepage, clearance, and insulation requirements. Not so much a concern for Class III products. I would only suggest using these coatings as a last resort. They also add a great deal to the cost of your product too. Regards, Alex McKinney Safety Engineer LXE, Inc. Tel: 770-447-4224 x3606 Fax: 770-447-6928 -Original Message- From: Darrell Locke [mailto:dlo...@advanced-input.com] Sent: Friday, January 11, 2002 1:52 PM To: 'Aschenberg, Mat' Cc: emc-p...@majordomo.ieee.org Subject: RE: Spray-on Conductive Coatings Thanks Matt, I was not aware that a UL approved painter/applicator was required. Is this in a standard, or is it just a common practice? Darrell Locke -Original Message- From: Aschenberg, Mat [mailto:matt.aschenb...@echostar.com] Sent: Friday, January 11, 2002 10:34 AM To: Darrell Locke Cc: emc-p...@majordomo.ieee.org Subject: RE: Spray-on Conductive Coatings Darrell, I have used this process in the past. It presents a bit of a safety nightmare. The products I work on are UL tested and approved. Getting a product approved with UL having a spray-on conductive coating is difficult. The spray needs to be UL listed for use with the particular plastic you are going to use. Then you need to find a UL approved Painter (applicator) who uses the UL approved process to apply the spray-on conductive coating. Once is enough. I stay away from those like a plague. Mat -Original Message- From: Darrell Locke [SMTP:dlo...@advanced-input.com] Sent: Friday, January 11, 2002 10:24 AM To: emc-p...@majordomo.ieee.org Subject: Spray-on Conductive Coatings Dear Colleages, We have seen an issue lately with spray-on conductive coatings used on the inside of electronic enclosures. The coating works great for EMC, but there seems to be a problem with adhesion and tiny flakes of conductive material getting in the electronics. I'm thinking that the spray-on type materials should not be used at all. Has anyone else experienced this problem? Thanks Darrell Locke Advanced Input Devices Coeur d'Alene ID --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server. --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server. --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server.
RE: Spray-on Conductive Coatings
I do not believe it's required. If the plastic/coating and applicator are under the UL746 program then you do not need to do any testing to qualify your product. If it is not then it must be tested. We have been using conductive coatings for 15+ years and as long as the combo is under the UL program it's been accepted without testing. Also, never have had any quality problems with these materials either. Dave Clement Motorola Inc. Global Homologation Engineering 20 Cabot Blvd. Mansfield, MA 02048 P:508-851-8259 F:508-851-8512 C:508-725-9689 mailto:dave.clem...@motorola.com -Original Message- From: Darrell Locke [mailto:dlo...@advanced-input.com] Sent: Friday, January 11, 2002 1:52 PM To: 'Aschenberg, Mat' Cc: emc-p...@majordomo.ieee.org Subject: RE: Spray-on Conductive Coatings Thanks Matt, I was not aware that a UL approved painter/applicator was required. Is this in a standard, or is it just a common practice? Darrell Locke -Original Message- From: Aschenberg, Mat [mailto:matt.aschenb...@echostar.com] Sent: Friday, January 11, 2002 10:34 AM To: Darrell Locke Cc: emc-p...@majordomo.ieee.org Subject: RE: Spray-on Conductive Coatings Darrell, I have used this process in the past. It presents a bit of a safety nightmare. The products I work on are UL tested and approved. Getting a product approved with UL having a spray-on conductive coating is difficult. The spray needs to be UL listed for use with the particular plastic you are going to use. Then you need to find a UL approved Painter (applicator) who uses the UL approved process to apply the spray-on conductive coating. Once is enough. I stay away from those like a plague. Mat -Original Message- From: Darrell Locke [SMTP:dlo...@advanced-input.com] Sent: Friday, January 11, 2002 10:24 AM To: emc-p...@majordomo.ieee.org Subject: Spray-on Conductive Coatings Dear Colleages, We have seen an issue lately with spray-on conductive coatings used on the inside of electronic enclosures. The coating works great for EMC, but there seems to be a problem with adhesion and tiny flakes of conductive material getting in the electronics. I'm thinking that the spray-on type materials should not be used at all. Has anyone else experienced this problem? Thanks Darrell Locke Advanced Input Devices Coeur d'Alene ID --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server. --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server. --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server.
Fwd: Re: Spray-on Conductive Coatings
Darrell and all, Many of our clients work with a company that applies conductive coatings on numerous electronic plastic housings. They have had much success in providing this particular process to our customers and seem to be the know all group in this industry. We like to stay up on what what they do for our clients. Comments: 1. For conductive paint application to work, the paint needs to be compatible with the plastic substrate and the substrate be free of any contamination. 2. You could have a quality issue with the paint you are receiving from your vendor. 3. Poor masking of parts. 4. Getting paint inside bosses (not masking the bosses). They do provide another technology called Selective Electroless Copper/Nickel Plating that will likely meet your EMC requirements and provide you with a durable finish (excellent adhesion characteristics) that meets various temperature and humidity testing (4-4-16 Test). The first step in the process is the spray application of a catalytic primer paint to be put directly on the substrate in the required shielded areas. This paint is applied at .4 to .8 mils dry (conductive paint is sprayed on at 1.5 to 2 mils dry). The parts are then placed in an electroless copper bath receiving a total copper thickness of 80 microinches. In this stage, the parts have an electroless nickel applied over the copper to protect and keep the copper coating from oxidizing. The nickel coat goes on at 20 microinches. This process will achieve resistivity reading of less than 1 ohms. For further questions on the adhesion dilemma or more information on the Selective Electroless process these guys are a great resource. Contact: Bill Couch at Cybershield in Atlanta, Georgia at 770-479-1001 or by e-mail at bco...@cybershieldinc.com. Good Luck. Best Regards, Scott Proffitt Advanced Compliance Solutions, Inc. 770-831-8048 www.acstestlab.com From: Darrell Locke dlo...@advanced-input.com To: Internet Mail::[emc-p...@majordomo.ieee.org] Subject: Spray-on Conductive Coatings List-Post: emc-pstc@listserv.ieee.org Date: 1/11/02 9:24 AM Dear Colleages, We have seen an issue lately with spray-on conductive coatings used on the inside of electronic enclosures. The coating works great for EMC, but there seems to be a problem with adhesion and tiny flakes of conductive material getting in the electronics. I'm thinking that the spray-on type materials should not be used at all. Has anyone else experienced this problem? Thanks Darrell Locke Advanced Input Devices Coeur d'Alene ID --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server.
RE: Spray-on Conductive Coatings
Darrell, UL will require it if you seek UL approval for your device. Mat -Original Message- From: Darrell Locke [SMTP:dlo...@advanced-input.com] Sent: Friday, January 11, 2002 11:52 AM To: Aschenberg, Mat Cc: emc-p...@majordomo.ieee.org Subject: RE: Spray-on Conductive Coatings Thanks Matt, I was not aware that a UL approved painter/applicator was required. Is this in a standard, or is it just a common practice? Darrell Locke -Original Message- From: Aschenberg, Mat [mailto:matt.aschenb...@echostar.com] Sent: Friday, January 11, 2002 10:34 AM To: Darrell Locke Cc: emc-p...@majordomo.ieee.org Subject: RE: Spray-on Conductive Coatings Darrell, I have used this process in the past. It presents a bit of a safety nightmare. The products I work on are UL tested and approved. Getting a product approved with UL having a spray-on conductive coating is difficult. The spray needs to be UL listed for use with the particular plastic you are going to use. Then you need to find a UL approved Painter (applicator) who uses the UL approved process to apply the spray-on conductive coating. Once is enough. I stay away from those like a plague. Mat -Original Message- From: Darrell Locke [SMTP:dlo...@advanced-input.com] Sent: Friday, January 11, 2002 10:24 AM To: emc-p...@majordomo.ieee.org Subject:Spray-on Conductive Coatings Dear Colleages, We have seen an issue lately with spray-on conductive coatings used on the inside of electronic enclosures. The coating works great for EMC, but there seems to be a problem with adhesion and tiny flakes of conductive material getting in the electronics. I'm thinking that the spray-on type materials should not be used at all. Has anyone else experienced this problem? Thanks Darrell Locke Advanced Input Devices Coeur d'Alene ID --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server. --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server.
RE: Spray-on Conductive Coatings
Yes, Hewlett-Packard and now Agilent uses spray-on conductive coatings. We require our vendor to have there process UL approved. If you go to UL 746C it will describe the test method. Paul N. Gardner Company makes a testing set for checking coating adhesion. Ron Duffy Product Safety Engineer Design Validation Unit Agilent Technologies 1900 Garden of the Gods Road Colorado Springs, CO 80907-3483 719 590 2335 Tel 719 590 3033 Fax www.agilent.com -Original Message- From: Darrell Locke [mailto:dlo...@advanced-input.com] Sent: Friday, January 11, 2002 10:24 To: emc-p...@majordomo.ieee.org Subject: Spray-on Conductive Coatings Dear Colleages, We have seen an issue lately with spray-on conductive coatings used on the inside of electronic enclosures. The coating works great for EMC, but there seems to be a problem with adhesion and tiny flakes of conductive material getting in the electronics. I'm thinking that the spray-on type materials should not be used at all. Has anyone else experienced this problem? Thanks Darrell Locke Advanced Input Devices Coeur d'Alene ID --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server. --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server.
RE: Spray-on Conductive Coatings
Thanks Matt, I was not aware that a UL approved painter/applicator was required. Is this in a standard, or is it just a common practice? Darrell Locke -Original Message- From: Aschenberg, Mat [mailto:matt.aschenb...@echostar.com] Sent: Friday, January 11, 2002 10:34 AM To: Darrell Locke Cc: emc-p...@majordomo.ieee.org Subject: RE: Spray-on Conductive Coatings Darrell, I have used this process in the past. It presents a bit of a safety nightmare. The products I work on are UL tested and approved. Getting a product approved with UL having a spray-on conductive coating is difficult. The spray needs to be UL listed for use with the particular plastic you are going to use. Then you need to find a UL approved Painter (applicator) who uses the UL approved process to apply the spray-on conductive coating. Once is enough. I stay away from those like a plague. Mat -Original Message- From: Darrell Locke [SMTP:dlo...@advanced-input.com] Sent: Friday, January 11, 2002 10:24 AM To: emc-p...@majordomo.ieee.org Subject: Spray-on Conductive Coatings Dear Colleages, We have seen an issue lately with spray-on conductive coatings used on the inside of electronic enclosures. The coating works great for EMC, but there seems to be a problem with adhesion and tiny flakes of conductive material getting in the electronics. I'm thinking that the spray-on type materials should not be used at all. Has anyone else experienced this problem? Thanks Darrell Locke Advanced Input Devices Coeur d'Alene ID --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server. --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server.
RE: Spray-on Conductive Coatings
Darrell, I have used this process in the past. It presents a bit of a safety nightmare. The products I work on are UL tested and approved. Getting a product approved with UL having a spray-on conductive coating is difficult. The spray needs to be UL listed for use with the particular plastic you are going to use. Then you need to find a UL approved Painter (applicator) who uses the UL approved process to apply the spray-on conductive coating. Once is enough. I stay away from those like a plague. Mat -Original Message- From: Darrell Locke [SMTP:dlo...@advanced-input.com] Sent: Friday, January 11, 2002 10:24 AM To: emc-p...@majordomo.ieee.org Subject: Spray-on Conductive Coatings Dear Colleages, We have seen an issue lately with spray-on conductive coatings used on the inside of electronic enclosures. The coating works great for EMC, but there seems to be a problem with adhesion and tiny flakes of conductive material getting in the electronics. I'm thinking that the spray-on type materials should not be used at all. Has anyone else experienced this problem? Thanks Darrell Locke Advanced Input Devices Coeur d'Alene ID --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server. --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server.
Spray-on Conductive Coatings
Dear Colleages, We have seen an issue lately with spray-on conductive coatings used on the inside of electronic enclosures. The coating works great for EMC, but there seems to be a problem with adhesion and tiny flakes of conductive material getting in the electronics. I'm thinking that the spray-on type materials should not be used at all. Has anyone else experienced this problem? Thanks Darrell Locke Advanced Input Devices Coeur d'Alene ID --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server.
