Electronics Forum: chips (Page 247 of 260)

Re: Rework

Electronics Forum | Fri Mar 10 15:47:35 EST 2000 | Casey Scheu

Russ, As I stated earlier 100% satisfaction guaranteed. I'd like to address a couple of your problems. 1. Lack of TC control. I don't really understand this issue. The system is a closed loop system w/ the TC located directly in the nozzle block.

Gold coated spring contacts

Electronics Forum | Wed May 30 17:49:49 EDT 2001 | davef

You are correct. IPC wants you to pay for that standard, regardless if you get a hard copy or download it. Generally, it�s pretty boring stuff for production types. [Although, you will recognize some of the goofy things your designers have done to

Re: smt reliability vs thru hole

Electronics Forum | Tue Jan 18 12:36:11 EST 2000 | Dave F

Dave: I haven't located something to support your contention, yet, and I'm not going to comment on the factors that drive reliability beyond component selection, because I know that you've got some sweaty-palmed sales type wringing his hands waiting

Need advise on regarding Vias

Electronics Forum | Mon Dec 13 00:48:33 EST 1999 | armin

Hi All I have a 0.7 mm diameter hole for vias, what�s the minimum annular ring for this hole diameter? What�s the term unsupported and supported holes refer to in IPC-2221 9.1.2 Annular Ring Requirements? I have a proto-type PCB (designed by our R&

Re: Cost per placement measure

Electronics Forum | Wed Oct 13 03:38:21 EDT 1999 | Paul Gerits

Hi Morris, I work as a technical consultant, application specialist for Philips EMT (SMT machine suplier). For cost per placement complex calculation can be made. To make a easy one just to hav an idea you can use following. Information needed: Pr

Re: IR rework stations

Electronics Forum | Tue Sep 28 04:07:33 EDT 1999 | Jacqueline Coia

| | | | | | | Hiya, | | | | | | | | | | | | | | Could anyone please suggest recommended manufacturers of | | | | | | | IR rework stations for the removal of various SMT comps. | | | | | | | | | | | | | | Cheers | | | | | | | | | | | | | Why IR ?

Re: IR rework stations

Electronics Forum | Tue Sep 28 04:27:04 EDT 1999 | Wolfgang Busko

| | | | | | | | Hiya, | | | | | | | | | | | | | | | | Could anyone please suggest recommended manufacturers of | | | | | | | | IR rework stations for the removal of various SMT comps. | | | | | | | | | | | | | | | | Cheers | | | | | | | | | | | |

Re: Soldering to Gold

Electronics Forum | Fri Sep 17 06:01:12 EDT 1999 | Earl Moon

| | 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

Re: Aperature opening for epoxy printing

Electronics Forum | Sat Aug 07 11:10:03 EDT 1999 | JohnW

| Could someone give recommendation on the stencil opening for printing epoxy on HAL FR4 PCB for 0805 and 0603 size chips capacitors and resisitors. | My regular stencil manufacturer recommend the following: | Thickness: 8 mils | 0805 opening: Oblong

Re: Off Pad Printing

Electronics Forum | Mon Jun 28 22:02:13 EDT 1999 | Dave F

| Hey there gang, how's it going ? | | Anyway's here's my probelm, got a new product to build double sided reflow, lot's of so20's and PLcc's 1206's, 0805's the usual stuff. Probelm is all the pad spacing of the 1206's are too big, my component's ar


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