## Electronics Forum: paste print (Page 1 of 222)

### Solder paste print with two thicknesses

Electronics Forum | Wed Oct 07 03:34:11 EDT 1998 | Thomas Blesinger

I am trying to find out, what possibilities I have, to print solder paste on a board, when the task is to have 120 Microns thickness for the biggest part of the board (85% of the real estate), and then have 250 Microns of thickness on the remaining

### Re: Solder paste print with two thicknesses

Electronics Forum | Wed Nov 01 13:28:41 EST 2000 | Fraser

Thomas, Dave is right - we had a similar coplanarity problem on some BGAs which we solved simply by over printing - no step required by nearly 2 x what happens is that the paste hight will grow as the paste reflows confined by the pad drop me line a

### Re: Solder paste print with two thicknesses

Electronics Forum | Fri Oct 09 04:06:27 EDT 1998 | Thomas Blesinger

| Thomas: What shape and size are the aperatures to print paste for the connector? Can you do something like ... | | 1 Using a (250m + 120m)/2 or so thick foil? | 2 Pinching the non-connector pads? | 3 Increasing the aperatures for the connecto

### Re: Solder paste print with two thicknesses

Electronics Forum | Wed Oct 07 06:22:23 EDT 1998 | Charles Stringer

| I am trying to find out, what possibilities I have, to print solder paste on a board, when the task is to have 120 Microns thickness for the biggest part of the board (85% of the real estate), and then have 250 Microns of thickness on the remainin

### Re: Solder paste print with two thicknesses

Electronics Forum | Thu Oct 08 07:04:54 EDT 1998 | JGodfrey

| I am trying to find out, what possibilities I have, to print solder paste on a board, when the task is to have 120 Microns thickness for the biggest part of the board (85% of the real estate), and then have 250 Microns of thickness on the remainin

### Re: Solder paste print with two thicknesses

Electronics Forum | Wed Oct 07 11:05:16 EDT 1998 | Dave F

| I am trying to find out, what possibilities I have, to print solder paste on a board, when the task is to have 120 Microns thickness for the biggest part of the board (85% of the real estate), and then have 250 Microns of thickness on the remainin

### Re: Solder paste print with two thicknesses

Electronics Forum | Tue Oct 13 04:34:53 EDT 1998 | Sanjay Bhatikar

Sir, I have been thinking about your problem. I have a suggestion that may work, although it has not been tried before. How about using two stencils? First print the the whole board with a stencil for 150 micron thickness. Next, place a ste

### Re: Solder paste print with two thicknesses

Electronics Forum | Thu Oct 08 22:20:44 EDT 1998 | Dave F

| | | I am trying to find out, what possibilities I have, to print solder paste on a board, when the task is to have 120 Microns thickness for the biggest part of the board (85% of the real estate), and then have 250 Microns of thickness on the rema

### Re: Solder paste print with two thicknesses

Electronics Forum | Fri Oct 09 04:08:45 EDT 1998 | Thomas Blesinger

| | | | I am trying to find out, what possibilities I have, to print solder paste on a board, when the task is to have 120 Microns thickness for the biggest part of the board (85% of the real estate), and then have 250 Microns of thickness on the re

### Re: Solder paste print with two thicknesses

Electronics Forum | Wed Oct 07 14:28:25 EDT 1998 | MMurphy

| I am trying to find out, what possibilities I have, to print solder paste on a board, when the task is to have 120 Microns thickness for the biggest part of the board (85% of the real estate), and then have 250 Microns of thickness on the remainin

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