TECHNET Archives

December 2000

TechNet@IPC.ORG

Options: Use Monospaced Font
Show Text Part by Default
Show All Mail Headers

Message: [<< First] [< Prev] [Next >] [Last >>]
Topic: [<< First] [< Prev] [Next >] [Last >>]
Author: [<< First] [< Prev] [Next >] [Last >>]

Print Reply
Subject:
From:
"Stephen R. Gregory" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Wed, 27 Dec 2000 21:16:48 EST
Content-Type:
text/plain
Parts/Attachments:
text/plain (109 lines)
Hijack!

These questions come from recent experience. I'll make this easy, a 50/50
chance, true or false...hope this will stimulate some interesting dialog. I
hope that those of you that deal with these issues may sympathize with me...

1. If surface mount devices are used in a design, a solder paste layer should
be included in the gerber files.

A: True
B: False

2. If surface mount devices are use in an assembly, there should be fiducials
incorporated somewhere in the solder paste layer.

A: True
B: False

3. When surface mount devices are used in an assembly, one should consult the
manufacturer of the device for a recommended footprint.

A: True
B: False

4. If a PTH board design has heavy internal metal layers, don't worry about
it, or worry about effective thermal reliefs, the people on the production
floor will figure out how to solder it.

A. True
B. False

5. Always use dry-film masks when you want via's tented...even if there is
fine pitch SMT on the board.

A. True
B. False

6. Don't ever worry about clearances for tooling when laying out a SMT
assembly that has swaged test points in the assembly.

A. True
B. False

7. Don't worry whether or not if a original PTH board layout was done for 1/4
watt axial resistors, but things changed to use 1/2 watt axial resistors...no
big deal, it's okay.

A. True
B. False

8. Always spec out HASL for the final finish on a PCB...after all, nothing
solders to solder, like solder.

A. True
B. False

9. Always use polyimide laminates for high-rel assemblies, because that's the
way it's always been done.

A. True
B. False

10. Always spec out using RMA fluxes on the drawing, or spec out assembling
to MIL-2000 specs when assembling high-rel assemblies, because that's the way
it's always been done.

A. True
B. False

-Steve Gregory-


<< I am creating a multiple choice test for PCB Designers
 (similar to the IPC Designer Certification test, but available to all)


 If you can think of a question that EVERY designer should know
 OR
 If you are a vendor and have a question you WISH everyone knew
 OR
 If you have a question that only the BEST designers would know
 OR
 If you can stump all us with something only YOU know...

 If you want to be immortalized by having YOUR question included
 (with one correct answer and four "plausible sounding" wrong answers)
 BRING IT ON!
 (I bet you can't come up with anything I can't answer! MwaHaHa!)

 If you don't want to clutter the email listserver, please forward it to
 mailto:[log in to unmask]

 Jack

 p.s. the test will be available at brainbench.com if you want to see it

 p.p.s Please do NOT copy anything directly from the IPC test.
 I have never actually seen it, but I'm sure it is copyrighted >>

---------------------------------------------------------------------------------
Technet Mail List provided as a free service by IPC using LISTSERV 1.8d
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt delivery of Technet send the following message: SET Technet NOMAIL
Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives
Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315
---------------------------------------------------------------------------------

ATOM RSS1 RSS2