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Dry Film Lamination

Written by Chuck. Posted in Preparation

 
This process used to laminate film to the PCB board is the same for both photo resist and solder mask.  This process is referred to as dry film lamination.
The key result of this process is to apply whichever laminate you're using, to the PC Board, without wrinkles or other defects.  It can be accomplished easily with just a little practice.
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Photo Imaging Exposure Calibration

Written by Chuck. Posted in Preparation

Photo image exposure calibration

Whenever you get a new supply of dry film photo resist or dry film solder mask you need to determine the correct exposure settings.

Read more below to see how this is done.

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Printing negative and positive stencils

Written by Chuck. Posted in Preparation

The best program I could find for printing gerbers to stencils to use for resist and masks is ViewMate 11.0.71. You can down load it free from

http://www.pentalogix.com/

Almost all of the other programs I tried, GerbView, GCPrevue, CAM350, CircuitCam, CooperCam and Gerv either won’t permit moving the gerbers are for printing on one page or they print with the black areas as a hatch which won’t work for our application. (Note: Save is disabled on the free version of ViewMate. But once you print the negatives you need you don’t need to save the job.)

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Preparing a new blank PCB

Written by Chuck. Posted in Preparation

I have a routing I use to prepare a new blank PCB for processing.
I need to drill alignment holes for positioning the board on the table, mounting holes for the plating process and some reference holes to check zero alignment during the process.
See the video below for the process.
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Preparing a PCB for a project

Written by Chuck. Posted in Preparation

I have a few steps I take for each board before I start the actual drilling, plating, etcing process.

Mark the board with the project name and board version.

Drill an alignment hole for resetting zero on the mill.

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