UNNECESSARY PLATING PEELING DEVICE FOR PARTIAL PLATING DEVICE

• Main Author: KUWABARA KAZUMI
• Format: Patent
• Language: English
• Published: 14.08.2001
• Edition: 7
• Subjects: APPARATUS THEREFOR; BASIC ELECTRIC ELEMENTS; CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; CONVEYING; DIFFUSION TREATMENT OF METALLIC MATERIAL; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; ELECTROFORMING; ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; HANDLING THIN OR FILAMENTARY MATERIAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLICMATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASSC23 AND AT LEAST ONEPROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25; NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; PACKING; PERFORMING OPERATIONS; PNEUMATIC TUBE CONVEYORS; PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS; PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROMOBJECTS; SEMICONDUCTOR DEVICES; SHOP CONVEYOR SYSTEMS; STORING; TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING ORTIPPING; TRANSPORTING

PROBLEM TO BE SOLVED: To provide an unnecessary plating peeling device for lead frames which is capable of making sufficient sealing, sufficiently executing powder feeding in electrolytic peeling, efficiently peeling unnecessary plating without the impairment of necessary partial plating and reducing a floor area. SOLUTION: A sealing roller 6, of which the plated surface 2 comes into surface-to-surface contact with an outer peripheral surface 20 made of rubber, is arranged at a position where the roller exists at the vertex of a triangular shape composed of a front roller 7 and a rear roller 8 within a peeling tank 4 in which the lead frame 1 is pulled by a drive roller and is moved. Passages from a feed port 9 into the tank through the front roller 7 to the sealing roller 6 and from the sealing roller 6 through the rear roller 8 to a delivery port 10 are provided with cover plates 12 an 13 so as to cover the surface 2. In the electrolytic peeling, a cathode plate 11 is disposed in the position above the sealing roller 6 and a power feeding roller 14 having a metallic outer peripheral surface is disposed as a power feeding section 5 at the position where the roller exists at a vertex of the triangular shape composed of a front roller 15 and a rear roller 16.