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Electronics Forum | Thu Aug 05 10:55:09 EDT 1999 | Wolfgang Busko
| | | | | | 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 components but
Electronics Forum | Thu Jul 08 12:33:52 EDT 1999 | Mike Demos
Thank you all for your replies. Thanks to your replies and backup from the IPC-SM-782A (section 3.6.3.2) and James Blankenhorn's "SMT Design Rules & Standards," the designer has agreed to provide adequate clearance between the via and the pad. I wi
Electronics Forum | Sat Jun 05 07:37:25 EDT 1999 | Dave F
| We are changing from through-hole to SMT, wondering what pitch requirements would an 8 pin SOAC require for pick and place? We think that this would be our finest pitch part. | John: Never heard of an "SOAC." SO packages are 50 ptch (50 mil, 1
Electronics Forum | Mon Jun 07 11:25:41 EDT 1999 | Brian Wycoff
| | | I have difficulty to convince my management to air-condition our manufacturing facilities. The room temperature fluxuates from 8 deg.C in the morning to 25 deg. C in the afternoon. The PCB topside temperatures in the reflow oven and wave solder
Electronics Forum | Mon Jun 07 16:52:51 EDT 1999 | Dave F
| | | | I have difficulty to convince my management to air-condition our manufacturing facilities. The room temperature fluxuates from 8 deg.C in the morning to 25 deg. C in the afternoon. The PCB topside temperatures in the reflow oven and wave sold
Electronics Forum | Tue Mar 23 10:22:17 EST 1999 | Chrys Shea
| Are there many of you who are soldering through hole parts in your surface mount reflow oven? How repeatable is the process? Do you need to touch up a lot after reflow? We don't do long runs maybe 200, 300 boards max. Can you just screen print
Electronics Forum | Wed Mar 24 19:26:25 EST 1999 | Marc Ruggiero
| Hi Folks, | This is my first surface mount board, so I asked our assembly house for some tips. They said only passives on the bottom side-preferably no smaller than 0805, 0603 only if I have to. I would think that an SOT-23 would be OK on the botto
Electronics Forum | Tue Dec 15 15:21:24 EST 1998 | Chrys
| SMTneters, | I'm famialiar with lambda, omega, and gemini waves but not with "A" wave. Can somebody give me an explanation? | | thanks | | Tom B. | Tom, The term "A" wave refers to an asymetrical wave. It's an Electrovert term that describes
Electronics Forum | Thu Oct 15 14:35:44 EDT 1998 | Joseph Belmonte
Hi Folks, As I travel our industry it seems to me the trend is to move from finner and finner pitch QFP's to array packages (BGA's, CSP's, etc.). Do you folks see the same trend? What is the finest pitch QFP package you have used in your process? Are
Electronics Forum | Tue Oct 13 15:38:23 EDT 1998 | Dave F
All Y'll How do you clean components that must be added to an assembled board after water wash? BACKGROUND Our basic process goes like this: 1 Print paste with OA flux, place, reflow, wash 2 Repeat 1 3 Insert PTH, OA flux, wave, wash 4 Insert
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