Method for sticking an insulating film to a lead frame
AssigneeHitachi Cable, Ltd.
InventorsToshio Kawamura, Takashi Suzumura, Makoto Aida, Hiroshi Sugimoto, Shigeharu Takahagi, Yuju Endo, Toshi Sasaki, Hiroyuki Takasaka
Life of this patent
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Abstract
A method for punching an insulating film is composed of using plural divided punches having a clearance between each two of the divided punches. The clearance absorbs thermal expansion of the divided punches caused by receiving a heat from a heater. A punched insulating film is stuck to a lead frame by being pressed between the divided punches and the heater.
Claims4
A method for sticking an insulating film to a lead frame comprising the steps of:
- providing a punch for punching a thermally adhesive insulating film, said punch having a clearance within it for absorbing thermal expansion thereof;
- punching said thermally adhesive insulating film to provide a punched film by said punch;
- heating a lead frame placed on a heater by said heater;
- and
- pressing said punched film to said lead frame on said heater by said punch, thereby sticking said punched film to said lead frame
- wherein thermal expansion of said punch occupying as a result of carrying out the step of heating said lead frame is absorbed by said clearance of said punch.
A method for sticking an insulating film to a lead frame comprising the steps of:
- providing a punch for punching thermally adhesive insulating film;
- punching said thermally adhesive insulating film to provide a punched film by said punch;
- providing a lead frame placed between a heater, for heating said lead frame, and said punch;
- providing a means for maintaining a constant pressing force produced between said punched film and said lead frame, said means mounting said heater and functioning to move said heater up and down;
- moving said heater up to a predetermined position level in accordance with the function of said means to contact and heat said lead frame;
- and
- fixing said punched film on said heated lead frame in accordance with said pressing force.
Dependencies are inferred from the claim text.