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On 12:11 PM 4/10/2001 -0700, Abd ul-Rahman Lomax said: >This is overkill. 8/8 has been standard production for a long time, I've >been told that 7/7 is also no problem, things start to get dicier at 6/6 >but that is still common. Below that things get more difficult for the >fabricator. 4/4 is pretty much the finest I've seen advertised for normal >production materials. There is a company in Oz that will do 0.05mm tracks and spaces (2 mils) as a special on FR4. Their process is unusual. Substrate is plasma coated to 2 micrometre. The etching is don on this tiny layer and then plating is performed. They claim much lower undercut, edge smoothness and the results I have seen support this. These are the best looking board I have seen. They have been doing this for years - I used to get some RF boards on really soft soggy material done by them, including almost complete edge plating. http://www.lintek.com.au for those interested. Ian Wilson * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * 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] * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
