thanks for your comments, we hope to do a no via design i hadn't thought about the flammability, will look into that but lots of UL/CE products use phenolic bds
Dennis Saputelli Brad Velander wrote: > > Dennis, > while you state this is a single etch layer design, I assume that > you have vias. Am I right? Phenolic or CEM1 will not electroplate reliably > or at least not without contaminating the plating bath with phenols. If you > are doing the silver via epoxy process then forget the above comments. If > you are plating then you will want to look at CEM3 at least, possibly CEM4. > CEM 3 and CEM4 have fabric reinforcement of the laminate and will plate > without contaminating the bath. DO you need UL fire rating? Then you will > want to look at FR1. Lots of issues, lots of possibilities. Look into the > glass temperature of whatever you select. > > Sincerely, > Brad Velander. > > Lead PCB Designer > Norsat International Inc. > Microwave Products > Tel (604) 292-9089 (direct line) > Fax (604) 292-9010 > email: [EMAIL PROTECTED] > http://www.norsat.com > > Visit us at Booth 2G2-09 at CommunicAsia 2002 in Singapore June 18-21. > > > -----Original Message----- > > From: Dennis Saputelli [mailto:[EMAIL PROTECTED]] > > Sent: Thursday, May 30, 2002 9:34 AM > > To: Protel EDA Forum > > Subject: Re: [PEDA] Help re bd material > > > > > > can anyone advise me on the following please? > > > > i am about to do a design for a 150,000 pc run > > for cost reasons (low end commercial product) the bd material must be > > made out of night soil (actually phenolic) > > > > the design is SMD and to be a single sided bd (one etch layer)! > > > > the lead pitch is 0.5mm on a 108 PQFP and a 48 PQFP > > > > trace density and net count will be low so i think it will be routable > > > > so the question is: > > are there etch considerations, lead pitch minimums or other > > considerations regarding the material? > > > > i.e. can you actually put a 108 PQFP on phenolic and reflow > > it properly? > > > > i guess CEM might be a possible choice > > every dime is $15K, so this stuff matters > > > > we are not going to do a proto, just going right to the run > > (only kidding!) > > > > Dennis Saputelli -- ___________________________________________________________________________ www.integratedcontrolsinc.com Integrated Controls, Inc. tel: 415-647-0480 2851 21st Street fax: 415-647-3003 San Francisco, CA 94110 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * To post a message: mailto:[EMAIL PROTECTED] * * To leave this list visit: * http://www.techservinc.com/protelusers/leave.html * * Contact the list manager: * mailto:[EMAIL PROTECTED] * * Forum Guidelines Rules: * http://www.techservinc.com/protelusers/forumrules.html * * Browse or Search previous postings: * http://www.mail-archive.com/[email protected] * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
