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

Printed Circuit Board Assembly & PCB Design Forum

SMT electronics assembly manufacturing forum.


Metal Inspection Templates

Mike H

#9443

Metal Inspection Templates | 21 September, 1999

I like to see if anyone has any info or experinces with metal inspection templates in a post oven process. My problem issue is the ESD, since they are metal(12 mil stencil material). I welcome any comment.

Thank you.

reply »

#9444

Re: Metal Inspection Templates | 21 September, 1999

| I like to see if anyone has any info or experinces with metal inspection templates in a post oven process. | My problem issue is the ESD, since they are metal(12 mil stencil material). I welcome any comment. | | Thank you. | Just for ESD reasons if you have metallplates ground them the way you do for your wristbands. Thought about AOI ?

Regards Wolfgang

reply »

Hugh Martin

#9445

Re: Metal Inspection Templates | 21 September, 1999

| | I like to see if anyone has any info or experinces with metal inspection templates in a post oven process. | | My problem issue is the ESD, since they are metal(12 mil stencil material). I welcome any comment. | | | | Thank you. | | | Just for ESD reasons if you have metallplates ground them the way you do for your wristbands. | Thought about AOI ? | | Regards | Wolfgang | There is an inspection template that is made from a SD material, and transparent when it touches the board, from KJ Marketing Services. You can reach them at mail@kjmarketing.com

Regards Hugh

reply »

Chris McDonald

#9446

Re: Metal Inspection Templates | 21 September, 1999

| | | I like to see if anyone has any info or experinces with metal inspection templates in a post oven process. | | | My problem issue is the ESD, since they are metal(12 mil stencil material). I welcome any comment. | | | | | | Thank you. | | | | | Just for ESD reasons if you have metallplates ground them the way you do for your wristbands. | | Thought about AOI ? | | | | Regards | | Wolfgang | | | There is an inspection template that is made from a SD material, and transparent when it touches the board, from KJ Marketing Services. You can reach them at mail@kjmarketing.com | | Regards | Hugh | Or even cheaper you can use an FR4 or Cem-3 material. I've used .040" Cem3 for inspection templates. Very cheap and esd safe.

Chris

reply »

#9447

Re: Metal Inspection Templates | 21 September, 1999

| | | I like to see if anyone has any info or experinces with metal inspection templates in a post oven process. | | | My problem issue is the ESD, since they are metal(12 mil stencil material). I welcome any comment. | | | | | | Thank you. | | | | | Just for ESD reasons if you have metallplates ground them the way you do for your wristbands. | | Thought about AOI ? | | | | Regards | | Wolfgang | | | There is an inspection template that is made from a SD material, and transparent when it touches the board, from KJ Marketing Services. You can reach them at mail@kjmarketing.com | | Regards | Hugh | Hugh: Is this SD material different from the polyimide that KJ sell as stencil material? If so, what are its ESD characteristics? Charge build-up on polyimide could seriously damage stuffed boards.

Dave F

reply »

Hugh Martin

#9448

Re: Metal Inspection Templates | 21 September, 1999

| | | | I like to see if anyone has any info or experinces with metal inspection templates in a post oven process. | | | | My problem issue is the ESD, since they are metal(12 mil stencil material). I welcome any comment. | | | | | | | | Thank you. | | | | | | | Just for ESD reasons if you have metallplates ground them the way you do for your wristbands. | | | Thought about AOI ? | | | | | | Regards | | | Wolfgang | | | | | There is an inspection template that is made from a SD material, and transparent when it touches the board, from KJ Marketing Services. You can reach them at mail@kjmarketing.com | | | | Regards | | Hugh | | | Hugh: Is this SD material different from the polyimide that KJ sell as stencil material? If so, what are its ESD characteristics? Charge build-up on polyimide could seriously damage stuffed boards. | | Dave F | Dave,

The material is not polyimide. It is anti static with Surface Resis. Dry - 10 to the 9 - 10 to the 11 ohms/sq Volume Resis. Dry - 10 to the 9 - 10 to the 11 ohms-cm Static Decay, 15% R.H. MIL-B-81705-B --- 0.18 Seconds

Hugh

reply »

#9449

Re: Metal Inspection Templates | 21 September, 1999

| | | | I like to see if anyone has any info or experinces with metal inspection templates in a post oven process. | | | | My problem issue is the ESD, since they are metal(12 mil stencil material). I welcome any comment. | | | | | | | | Thank you. | | | | | | | Just for ESD reasons if you have metallplates ground them the way you do for your wristbands. | | | Thought about AOI ? | | | | | | Regards | | | Wolfgang | | | | | There is an inspection template that is made from a SD material, and transparent when it touches the board, from KJ Marketing Services. You can reach them at mail@kjmarketing.com | | | | Regards | | Hugh | | | Or even cheaper you can use an FR4 or Cem-3 material. I've used .040" Cem3 for inspection templates. Very cheap and esd safe. | | Chris |The concept of using the KEPOCH stencils from KJ Marketing is appealing in a number of ways especially that your view of other areas not obstructed but is only tinted by the amber material. BUT, like most plastics, it can develop and hold a tremendous static charge. Since your concern is ESD I would be wary. As far as metal stencils, as Wolfgang says, ground them like a wristband but be careful for safety sake to have a 1 Meg resistor in the line to ground. some wristbands have the resistor in the cord and some have it in the band.

reply »

#9450

Re: Metal Inspection Templates | 21 September, 1999

| | | | | I like to see if anyone has any info or experinces with metal inspection templates in a post oven process. | | | | | My problem issue is the ESD, since they are metal(12 mil stencil material). I welcome any comment. | | | | | | | | | | Thank you. | | | | | | | | | Just for ESD reasons if you have metallplates ground them the way you do for your wristbands. | | | | Thought about AOI ? | | | | | | | | Regards | | | | Wolfgang | | | | | | | There is an inspection template that is made from a SD material, and transparent when it touches the board, from KJ Marketing Services. You can reach them at mail@kjmarketing.com | | | | | | Regards | | | Hugh | | | | | Or even cheaper you can use an FR4 or Cem-3 material. I've used .040" Cem3 for inspection templates. Very cheap and esd safe. | | | | Chris | |The concept of using the KEPOCH stencils from KJ Marketing is appealing in a number of ways especially that your view of other areas not obstructed but is only tinted by the amber material. BUT, like most plastics, it can develop and hold a tremendous static charge. Since your concern is ESD I would be wary. As far as metal stencils, as Wolfgang says, ground them like a wristband but be careful for safety sake to have a 1 Meg resistor in the line to ground. some wristbands have the resistor in the cord and some have it in the band. | well, I guess I have to eat my words about KJ. Missed part of the thread. Funny that they don't mention it in their literature.

reply »

Hugh Martin

#9451

Re: Metal Inspection Templates | 22 September, 1999

| | | | | | I like to see if anyone has any info or experinces with metal inspection templates in a post oven process. | | | | | | My problem issue is the ESD, since they are metal(12 mil stencil material). I welcome any comment. | | | | | | | | | | | | Thank you. | | | | | | | | | | | Just for ESD reasons if you have metallplates ground them the way you do for your wristbands. | | | | | Thought about AOI ? | | | | | | | | | | Regards | | | | | Wolfgang | | | | | | | | | There is an inspection template that is made from a SD material, and transparent when it touches the board, from KJ Marketing Services. You can reach them at mail@kjmarketing.com | | | | | | | | Regards | | | | Hugh | | | | | | | Or even cheaper you can use an FR4 or Cem-3 material. I've used .040" Cem3 for inspection templates. Very cheap and esd safe. | | | | | | Chris | | |The concept of using the KEPOCH stencils from KJ Marketing is appealing in a number of ways especially that your view of other areas not obstructed but is only tinted by the amber material. BUT, like most plastics, it can develop and hold a tremendous static charge. Since your concern is ESD I would be wary. As far as metal stencils, as Wolfgang says, ground them like a wristband but be careful for safety sake to have a 1 Meg resistor in the line to ground. some wristbands have the resistor in the cord and some have it in the band. | | | well, I guess I have to eat my words about KJ. Missed part of the thread. Funny that they don't mention it in their literature. | John, The product is new and has only been in test. the material has the following specs.The material is not polyimide. It is anti static with Surface Resis. Dry - 10 to the 9 - 10 to the 11 ohms/sq Volume Resis. Dry - 10 to the 9 - 10 to the 11 ohms-cm Static Decay, 15% R.H. MIL-B-81705-B --- 0.18 Seconds

Hugh

reply »

john

#9452

Re: Metal Inspection Templates | 25 September, 1999

| I like to see if anyone has any info or experinces with metal inspection templates in a post oven process. | My problem issue is the ESD, since they are metal(12 mil stencil material). I welcome any comment. | | Thank you. |

don't try overlays on boards, people don't tent to like them and its hard to get them to use them. its more easy on the brain to compare to a good sample board.

reply »

PCB X-Ray Inspection

pcb components X-ray inspection