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S.I.R. Of PCB

Views: 998


MSK

#36247

S.I.R. Of PCB | 23 August, 2005

Hi every body. I want to know acbout S.I.R. of PCB . What it should be & how we can measure?

Is for diffrent frequencies application board it is diffrent?

Please suggest.

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Bob R.

#36249

S.I.R. Of PCB | 23 August, 2005

There are several methods in IPC-TM-650 depending on whether you're testing for the effect of flux residues or board cleanliness. They're available for free download here:

http://www.ipc.org/contentpage.asp?PageID=4.1.0.1.1.6

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#36251

S.I.R. Of PCB | 23 August, 2005

There's some good background information on SIR [surface insulation resistance] on the web. Here's an example: http://www.tracelabs.com/TechLibraryDoc.aspx?id=4

Look to IPC-9201 - Surface Insulation Resistance Handbook

SIR readings vary with: * Comb pattern design * Board fabrication process * Board assembly process

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