Stencil foils delaminating

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The purpose of an SMT stencil is to transfer solder paste to a bare circuit board. Before the assembly of the SMT components solder paste is printed onto the component pads of the printed circuit board by stencil, which are today usually manufactured from steel, more rarely from nickel or polyimide.

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juanbrito

We are having continual problems with our stencil bindings falling apart in our washer.

We use a PMR5000 ultrasonic with Vigon sc2000 cleaning fluid. We cycle them in the washer for about 9 minutes.

The fluid sometimes heats up to 105 deg F.

Our stencil house has switched us to a more robust binding glue. Even with this new glue we are starting to see delamination after multiple wash cycles.

Does anyone else have this problem ?

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2017/2/28 21:44:38

Statement: This post is only the personal view of the author and does not represent the opinions of ALLPCB.com.

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2017/3/2 21:44:38

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