Electronics Forum: board (Page 1125 of 1638)

Good Solder Joint Failures

Electronics Forum | Mon Feb 15 15:43:06 EST 1999 | Dave Jurena

Hope some of you out there can help me with this one. I am getting feedback from our test department that they are showing opens on solder joints which have visually good wetting. The touch-up operators confirm that the joint looks good. All they do

Re: Die Removal Equipment

Electronics Forum | Sat Feb 06 07:39:30 EST 1999 | Wayne Bracy

| | | I am looking for a piece of equipement that can | safely remove silicon die(200mil by 200mils) from a LTCC board. My present method involves a dental drill which often goes through the dielectric layers and causes scrap. | | | | |

Re: SMD mounting method

Electronics Forum | Fri Feb 05 04:18:44 EST 1999 | Joni Siipola

| Joni: What is it about your situation with the board/component/process that makes you want to explore alternatives? Dave F Dave: In our case the component is placed on metalled footprint which has via holes to transfer the heat via holes to the

Re: PWB plating

Electronics Forum | Tue Feb 09 20:32:54 EST 1999 | Chris G.

| There is also the process where thicker levels or solder is being applied directly to the board. This means no solder paste is applied before component placement. Just flux, place, and refow. | | Chris G. | | Can you tell me more about the p

Re: White layer appearance on PCB

Electronics Forum | Thu Jan 28 17:31:20 EST 1999 | Earl Moon

| | | Hello Netters, | | | | | | I need some info, Earl or Dave, I have a PCB that exhibits a white layer on solder side. It does not appear to be surface residues (IPA has no effect), but looks like its under solder mask. My first guess is that t

Moisture Sensitivity and Package Cracking

Electronics Forum | Mon Jan 25 18:15:39 EST 1999 | Joe

Greetings, We are discussing what should and what should not be baked and vacuum packed. Should we just concentrate on the fine pitch packages and the bga's? What about those components which come on blister tape, should they get baked and re-packed

Re: Too hot to handle

Electronics Forum | Thu Jan 28 17:37:00 EST 1999 | Earl Moon

| | | | | Greetings, | | | | | | | | | | Can anyone tell me what temperatures pcb's should have when coming out of a forced convection reflow oven and out of a wavesoldering machine. | | | | | Also, is there any danger of the pcb's giving off some k

Re: Too hot to handle

Electronics Forum | Thu Jan 28 17:37:02 EST 1999 | Earl Moon

| | | | | Greetings, | | | | | | | | | | Can anyone tell me what temperatures pcb's should have when coming out of a forced convection reflow oven and out of a wavesoldering machine. | | | | | Also, is there any danger of the pcb's giving off some k

Re: Dry Storage Options

Electronics Forum | Fri Jan 22 12:24:56 EST 1999 | Michael Allen

I've had good luck with cabinets sold by Stanley Storage Systems (800-523-2449). This is a sturdy, steel cabinet (no windows) that is intended for nitrogen purge. It's less expensive than the specialty acrylic cabinets sold by other companies. We

Re: Dry Storage Options

Electronics Forum | Fri Jan 29 15:50:11 EST 1999 | Sarah Marshall

| I've had good luck with cabinets sold by Stanley Storage Systems (800-523-2449). This is a sturdy, steel cabinet (no windows) that is intended for nitrogen purge. It's less expensive than the specialty acrylic cabinets sold by other companies. W


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