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July 2000

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Subject:
Re: Tolerance on board thickness
From:
michael <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Thu, 6 Jul 2000 10:11:18 +0800
Content-Type:
text/plain
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text/plain (64 lines) 
Speaking as a fab house: it's tough, but no, it's not unreasonable to ask for
this kind of spec, but be prepared for a higher price, as base material
thickness will have to be tightly controlled, and should be checked throughout
the manufacturing process.

Michael Fennema
Uni-Circuit Inc.

-----原始郵件-----
寄件者: d. terstegge <[log in to unmask]>
收件者: [log in to unmask] <[log in to unmask]>
日期: Thursday, July 06, 2000 00:12
主旨: [TN] Tolerance on board thickness


Hi Technet,

It's quiet on Technet. Or is it just me ? Problems with the server again ?
Compensation for all the double messages from a few weeks ago ?
Anyway, I've got a small question :
We've ordered a 4 layer FR4 board with a thickness specification of 1.6 +/- 0.05
mm. The supplier says he can't build it with such narrow tolarances. The
customer won't accept anything worse than this.
What do you think, should the average fabhouse be able to build a board like
this or is it completely unrealistic ?
Hope to hear from you.

Kind Regards,

Daan Terstegge
SMT Centre
Signaal Communications
Unclassified mail
Personal Website: http://surf.to/smtinfo

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