Electronics Forum: chemtech (Page 1 of 1)

Re: Step down stencil

Electronics Forum | Mon Nov 23 14:35:14 EST 1998 | MMurphy

| Does any body know stencil manufacturer in states or south east asia for electroforming processes and step down from 5mil to 3mil. | | Thanks! | Hi Daniel, let me guess, you were using AMTX? Too bad their out of business, they made good products.

Re: BGA and Land Patterns

Electronics Forum | Wed Apr 28 14:41:45 EDT 1999 | Bob Willis

| | What is the current spec for sizing PCB pads for a land grid array? How about for a ball grid array? Are there industry spec's I can reference? | | | | Thanks, | | | | Frank | | | Frank, | Refer to the device manufacturers. they are going t

Re: STENCILS

Electronics Forum | Sun Aug 02 06:54:26 EDT 1998 | Bob Willis

You may liketo contact Chemtech in the UK. http://chemteck.co.uk as they have a new hand book on stencils and a design guide due for release shortly there is also some stencil information as a survey on types and price on my web sites under surveys h

Re: Alpha's Tetra Stencil System

Electronics Forum | Mon Jun 14 03:54:32 EDT 1999 | Charles Stringer

We have been using Alpha Tetra/DEK Vector for the last 3 years. Prior to that we were using mesh on frame. We do about 15 job changes a day and our main runners are loaded about 4 times per week. In the three years we have been using the system we h

Re: Alpha's Tetra Stencil System

Electronics Forum | Mon Jun 14 06:15:18 EDT 1999 | wayne sanita

| We have been using Alpha Tetra/DEK Vector for the last 3 years. Prior to that we were using mesh on frame. | We do about 15 job changes a day and our main runners are loaded about 4 times per week. In the three years we have been using the system

Re: Alpha's Tetra Stencil System

Electronics Forum | Mon Jun 14 15:05:10 EDT 1999 | John Thorup

| | We have been using Alpha Tetra/DEK Vector for the last 3 years. Prior to that we were using mesh on frame. | | We do about 15 job changes a day and our main runners are loaded about 4 times per week. In the three years we have been using the sys

Re: Alpha's Tetra Stencil System

Electronics Forum | Tue Jun 15 18:02:53 EDT 1999 | MMurphy

| | We have been using Alpha Tetra/DEK Vector for the last 3 years. Prior to that we were using mesh on frame. | | We do about 15 job changes a day and our main runners are loaded about 4 times per week. In the three years we have been using the sys

Re: BGA Repair Problems

Electronics Forum | Mon Aug 17 02:50:44 EDT 1998 | Bob Willis

| Have an SRT w/preheat, 18 layer board all copper, 456 BGA needs to be removed and replaced. The manufacturer is Chip Express and during reflow it warps up or down. Causing either opens or shorts on the corners. I was using gel flux with multiple

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