Printed Circuit Board Assembly & PCB Design SMT Electronics Assembly Manufacturing Forum

Printed Circuit Board Assembly & PCB Design Forum

SMT electronics assembly manufacturing forum.


Grant Petty

#16535

Alpha Level PCB's | 16 March, 1998

We are going to try out a PCB manufacturer that has an Alpha Level for ensuring a flat finish on the PCB's. I am interested to know if anyone has and experiences, either good or bad on how boards treated with this process are to assemble. Is there any reflow problems with the fine silver coating that the SMT pads have after this process? Thanks Grant Petty Digital Voodoo.

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Scott McKee

#16538

Re: Alpha Level PCB's | 16 March, 1998

| We are going to try out a PCB manufacturer that has an Alpha Level for ensuring a flat finish on the PCB's. | I am interested to know if anyone has and experiences, either good or bad on how boards treated with this process are to assemble. Is there any reflow problems with the fine silver coating that the SMT pads have after this process? | Thanks | Grant Petty | Digital Voodoo. I have one board that uses this. Though I only perform hand soldering on this, the results are excellent, I haven't had any problems with soldering. Scott

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Justin Medernach

#16537

Re: Alpha Level PCB's | 16 March, 1998

| We are going to try out a PCB manufacturer that has an Alpha Level for ensuring a flat finish on the PCB's. | I am interested to know if anyone has and experiences, either good or bad on how boards treated with this process are to assemble. Is there any reflow problems with the fine silver coating that the SMT pads have after this process? | Thanks | Grant Petty | Digital Voodoo. Grant, You will probably need to set your reflow temperature slightly higher than for a Sn/Pb finished board. This is for cosmetics of the solder joint and for limiting a possibly nasty intermetallic layer. Regards, Justin Medernach Flextronics Int'l PIC East

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Earl Moon

#16536

Re: Alpha Level PCB's | 16 March, 1998

| We are going to try out a PCB manufacturer that has an Alpha Level for ensuring a flat finish on the PCB's. | I am interested to know if anyone has and experiences, either good or bad on how boards treated with this process are to assemble. Is there any reflow problems with the fine silver coating that the SMT pads have after this process? | Thanks | Grant Petty | Digital Voodoo. Silver is as good as gold in the amounts deposited. No fear of silver migration in these amounts. Reflow excellent.

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PCB contract manufacturer

Reflow Oven