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Date: | Mon, 3 Jun 1996 14:16:39 -0400 |
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There are many other considerations which should be weighed
prior to accepting these boards. First any Fabricator should
not make judgements on the acceptability of product which
doesn't meet a Customers specifications. The Customer, in
most cases, has reasons for his specifications. There could
be a height issue, component lead issues, UL agency, designed
in capacitance ect.... The best course of action is to notify
your Customer and discuss the variation.
______________________________ Reply Separator _________________________________
Subject: Re[2]: Assy/Fab: PCB Thickness
Author: [log in to unmask] at Internet
Date: 6/3/96 12:38 PM
I believe that the additional thickness will do very little to the
electrical performance nor its reliability. Your vendor did a poor job
in material selection and his up front engineering stackup. The
problems in assembly would be if the axial leaded devices do not have
long enough leads to properly protrude through the board for good
solder connection practices.
______________________________ Reply Separator _________________________________
Subject: RE: Assy/Fab: PCB Thickness
Author: [log in to unmask] at SMTPpost1
Date: 6/3/96 11:51 AM
Dear Technet,
First, please bare with me my inexperience in PCB fabrication.
One of our customer's requirement for their PCB's thickness, ranges from
1.55 to 1.60 mm. However, our PCB manufacturer supplies us the thickness
ranges from 1.70 to 1.77 mm.
As our customer requires this board to be assemblied and shipped urgently,
I would like to know
a. how this happens ,
b. whether this difference in thickness will affect the assembly process,
c. whether it will affect the reliability and the electrical performance.
as to decide to use this board or to delay the shipment..
I thanks you in advance ...
Poh Kong Hui
Nera Electronics
Email: [log in to unmask]
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