Electronics Forum | Thu Oct 14 18:02:31 EDT 1999 | JohnW
Bryan, 0402's tombstonning isn't that uncommon and usually the 1st reaction is alway's the pad size aint right. If you've followed the IPC guidline's normally you should be fine but I'd double check the component supplier's spec's as well. brian's p
Electronics Forum | Wed Sep 29 23:54:07 EDT 1999 | Dreamsniper
Hi everyone, Greetings! I�ve got a 2-layered through-hole PCB�s having the following problems: Solder Mask peels after wave soldering at random locations and only at the bootom side of the PCB Insufficient Solder and some solder never make it to t
Electronics Forum | Sat Sep 25 07:07:02 EDT 1999 | Brian
| I need a memory jog. What is the term for the growth of conductive contamination after a board is in storage or field? | There are several different mechanisms which can cause this. In reality, ionic contamination is the root cause for many of the
Electronics Forum | Wed Sep 22 20:57:46 EDT 1999 | JAX
| | Question for you SMT guru's out there. | | | | What is the best way to support boards on Fuji's CP6 machine's x-y table...particularly for 2nd side SMT where the support side already has parts... I am toying around with the following methods: |
Electronics Forum | Thu Sep 16 20:55:35 EDT 1999 | Dave F
| | We have some SMT components with gold plated leads. They're actually LCC led packages. A good solder alloy to use would be Indium / Lead to reduce tin dissolution into the gold and avoid the resultant brittle intermetallic compound. However, a re
Electronics Forum | Fri Sep 10 15:32:30 EDT 1999 | Earl Moon
| We have a product, with various PWBs, with over 600 parts each one (We are a low Volume/high mix company with an average component placement per PCB between 250 to 300 parts). This PWBs have 7 to 10, 20 mils pitch parts. We are having problems with
Electronics Forum | Thu Sep 09 09:13:10 EDT 1999 | Scott Cook
| hi, i m college student. i m currently doing my Final year project in PCB drilling. the main task is to design auto feeder which allign the PCB properly in position before drilling take place. the close tolerance becomes a big problem to the precis
Electronics Forum | Thu Aug 05 11:15:39 EDT 1999 | John Thorup
| | | | | | | | | Hello, | | If you are using no-clean and they are entrapped in the flux it is also IPC accepted but i havent found a customer yet who agrees with that. Im sure you have checked your profile. I had the same problem with chip compon
Electronics Forum | Fri Jul 16 14:34:18 EDT 1999 | Glenn Robertson
| We are converting from COB to SMT on a product line and want to optomize the PCB as far as Laminate, plating, passivation etc. This is a high temp application 150C. We are presently using BT Laminate but would like to get away from this. We are
Electronics Forum | Tue Jul 06 17:03:46 EDT 1999 | Earl Moon
| Is anyone aware of some guidelines regarding through-hole in SMT pads? One of our designers wants to add through-hole leads in some SMT pads for an inductor. The size of the hole is 0.032 inches and takes-up approximately 25% of the pad area. Th
