2.6.1 Legend/Marking, Stamping Method
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This method can be used to add, change or replace legend
and markings on printed boards or printed board assemblies.
This method uses epoxy ink and an ink stamp to place
the legends on the printed board surface in much the
same manner as taking a "finger print".
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Tools and Materials
Cleaner
Color Agent/Epoxy
Ink
Ink Plate
Ink Roller
Microscope
Oven
Peg Stamps
Knife
Wipes
Procedure 2.6.1 Legend/Marking, Stamping
Method
Damaged Legend
Figure 1: Apply legend using a peg stamp.
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| 1. |
Clean the area.
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| 2. |
Scrape off any remaining character or legend
with a knife and clean the area.
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Caution
Abrasion operations can generate
electrostatic charges. |
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| 3. . |
Select the appropriate characters
from the peg stamp set or have a special stamp made
up. |
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| 4. |
Mix the epoxy ink. White is the
most common color. Spread a thin even coating of
the epoxy ink on the ink plate or on a smooth surface. |
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| 5. |
Gently press the peg stamp into
the epoxy coating to coat the character surface. |
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| 6. |
Gently press the peg stamp onto
the desired location on the circuit board surface.
(See Figure 1). |
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| 7. |
Cure the epoxy ink per the manufacturer's
instructions. |
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Figure 2: Completed legend repair. |
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Evaluation |
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| 1. |
Visual examination for proper characters,
positioning and legibility. |
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