Electronics Forum: board (Page 1136 of 1642)

Bud Dry After DI? My, my, my...

Electronics Forum | Tue Jul 07 07:44:23 EDT 1998 | Wayne

| Hey Dave... I agree with Steve, get them dry. Even though you are using DI water, once exposed to normal atmoshere the DI residue water will become contaminated. Fungus and board failure down the road. Not to mention if you plug it into test an

Using solder paste/reflow for leaded thru hole parts .

Electronics Forum | Wed Jul 01 11:33:30 EDT 1998 | Upinder Singh

Hi all. I am trying to put one 20 pin thru hole connector along with the smt components on the PCB. I would appreciate if somebody can guide me in getting thru this process. I also need to know how much bigger the holes on the screen or stencil shou

Re: Use of solder paste for leaded thru hole parts????

Electronics Forum | Mon Jul 06 13:17:50 EDT 1998 | Upinder Singh

| | Hi all . | | Thanks to Ryan, Brian , Justin and Dave for the timely help earlier. | | I would appreciate if somebody could help me in the stated issue: | | I am trying to to place one thru hole 20 pin connector along with the SMT components by p

Poor Solder on TSOP

Electronics Forum | Thu Jun 25 16:13:05 EDT 1998 | Mike McMonagle

I am looking for a little enlightenment with an issue that we have been seeing. We have SMT assemblies with poor solderability on TSOP and mini-QFP type devices. The solder appears to have incomplete reflow and/or grainyness to the joints. Everything

Polyimide See Thru Stencils for Printing Solder Paste

Electronics Forum | Tue Jun 23 11:27:37 EDT 1998 | Russ M

Has anyone seen/used these yet? They seem to have lower coefficient of friction for release of paste and less wear and tear as well as conforming to the board better (plastic has better memory than stainless). Also there is no mesh so a larger image

Re: Polyimide See Thru Stencils for Printing Solder Paste

Electronics Forum | Tue Jun 23 19:01:21 EDT 1998 | EC

| Has anyone seen/used these yet? They seem to have lower coefficient of friction for release of paste and less wear and tear as well as conforming to the board better (plastic has better memory than stainless). Also there is no mesh so a larger ima

Re: straddle mount connectors

Electronics Forum | Mon Jun 15 10:53:27 EDT 1998 | Process Engineer

| can any body help on assembling straddle mount connectors on to a board? for information on the connector - it is a berg micropak connector Automated and/or hand assembly?? Inline/offline configuration. Paste on both sides of connector pads?? Onse

BGA In-circuit Failure Analysis

Electronics Forum | Mon Jun 08 10:45:25 EDT 1998 | Henry Hickey

How do I mechanically/visually inspect BGA devices when they are soldered to a PCB for possible solder, or other, defects as a first step before part removal and further analysis? I have had board failures due to poor soldering--I think? I can pres

Solder masks for gold fingers

Electronics Forum | Thu Jun 04 09:29:21 EDT 1998 | Chrys

I have gold fingers that I want to mask when running over the wave without pallets. They're on the leading edge of the board. I recall seeing rubber boots that slid onto the fingers to mask them. Pop 'em on before the wave; pop' em off after and r

Vertically Mounting of a PWA to a PWA

Electronics Forum | Wed Jun 03 10:30:18 EDT 1998 | Daniel Shea

I need ideas for mounting without a connector a small pwa daughter card vertically to another pwa. I have seen u shaped clips for the edge of the card which allow you to insert and wave solder the card into the mother board. How are these clips atom


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