177 ipc-sm-840b results

Electronics Forum: ipc-sm-840b (4)

Re: Solder Mask IPC Standard

Electronics Forum | Fri Oct 08 18:26:19 EDT 1999 | Dave F

| | Is there an IPC Standard stating the max. number of times that a PCB can pass through a reflow or wavesolder machine without having solder mask breakdown. | | | | PCB is FR4 | | Solder Mask is LPI | | Reflow and W/S Profile = Standard | | | | t

Re: Solder Mask IPC Standard

Electronics Forum | Fri Oct 08 13:04:15 EDT 1999 | Dave F

| Is there an IPC Standard stating the max. number of times that a PCB can pass through a reflow or wavesolder machine without having solder mask breakdown. | | PCB is FR4 | Solder Mask is LPI | Reflow and W/S Profile = Standard | | thanks and rega

4 Questions & Answers

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? 18 Example of Debris in Solder Mask  IPC-SM-840 D Sect. 3.3 Visual Requirements: Solder mask appearance shall be observed visually in all stages of evaluation, qualification and conformance inspection with the aid of a magnifying lens rated between

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