Method for the electrolytic removal of plastic mold flash or ble

Details Method for the electrolytic removal of plastic mold flash or ble Method for the electrolytic removal of plastic mold flash or ble

1993-05-21

1994-11-08

Valentine, Donald R.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

20412995, C25F 100

Patent

active

053623703

ABSTRACT:
Immersing semiconductor devices and similar electronic components in an aqueous solution of one or more organic solvents, conducting salts and a wetting agent and connecting the components to be cleaned to the negative pole of a source of direct current, of which the positive pole is connected to an anode in the same solution, and passing current through the solution raises the pH of the electrolyte film on the cathodic metal surface to a value whereby the organic solvent causes a softening of the plastic mold flash or bleed, sufficient to enable the hydrogen gas generated simultaneously on the cathode to remove the plastic mold flash or bleed from the metal surfaces.

REFERENCES:
patent: 4781804 (1988-11-01), Wolf
patent: 4828661 (1989-05-01), Celi
patent: 4968397 (1990-11-01), Asher et al.
patent: 5174870 (1992-12-01), Puma
patent: 5232563 (1993-08-01), Warfield

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