PSR-4000MP mask equivalent, liquid photoimageable solder mask.
The spectral sensitivity of PSR-4000MP is in the area of 365 nm. Exposure times will vary by bulb type and age of the bulb. Below are guidelines for exposing PSR-4000MP .
PSR-4000MP meets or exceeds the requirements of IPC SM-840C Class H and Class T, Bellcore GR-78-CORE Issue 1, and has a.
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