Optoisolator leadframe assembly
AssigneesSilitek Electronic (Guangzhou) Co., Ltd., Lite-On Technology Corporation
InventorsCheng-Hong Su, Chih-Hung Tzeng
Life of this patent
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Abstract
An optoisolator leadframe assembly includes: an emitter leadframe part including a first rail and a plurality of emitter leadframe units, each rail including two rows of emitter leadframes, each having a die-mounting pad; and a receiver leadframe part including a second rail and a plurality of receiver leadframe units, each including two rows of receiver leadframes, each having a die-mounting pad. The die-mounting pads of the emitter leadframes of each row of each of the emitter leadframe units are respectively aligned with and spaced apart from the die-mounting pads of the receiver leadframes of an adjacent row of an adjacent one of the receiver leadframe units. Each of the emitter and receiver leadframe parts is a single piece.
Claims15
An optoisolator leadframe assembly comprising:
- an emitter leadframe part including a first rail extending in a first direction, and a plurality of emitter leadframe units extending from said first rail in a second direction perpendicular to the first direction, each of said emitter leadframe units including two rows of emitter leadframes that are symmetrically disposed;
- and
- a receiver leadframe part including a second rail parallel to said first rail, and a plurality of receiver leadframe units extending from said second rail in the second direction and disposed alternately with said emitter leadframe units, each of said receiver leadframe units including two rows of receiver leadframes that are symmetrically disposed.
An optoisolator leadframe assembly comprising:
- a emitter leadframe part including a first rail extending in a first direction, and a plurality of spaced apart emitter leadframe units aligned in the first direction, each of said emitter leadframe units extending from said first rail in a second direction perpendicular to the first direction, and including at least one row of emitter leadframes, said emitter leadframes of each of said emitter leadframe units being aligned in the second direction, each of said emitter leadframes having a die-mounting pad and a pair of leads;
- and
- a receiver leadframe part including a second rail parallel to said first rail, and a plurality of spaced apart receiver leadframe units aligned in the first direction and disposed alternately with said emitter leadfrare units, each of said receiver leadframe units extending from said second rail in the second direction, and including at least one row of receiver leadframes, said receiver leadframes of each of said receiver leadframe units being aligned in the second direction, each of said receiver leadframes having a die-mounting pad and a pair of leads;
- wherein said die-mounting pads of said emitter leadframes of each of said emitter leadframe units are respectively aligned with and spaced apart from said die-mounting pads of said receiver leadframes of an adjacent one of said receiver leadframe units in a third direction perpendicular to the first and second directions;
- wherein each of said emitter and receiver leadframe parts is a single piece;
- wherein each of said emitter leadframe units further includes a free end portion that is connected to an endmost one of said emitter leadframes and that is in contact with said second rail;
- and
- wherein each of said receiver leadframe units further includes a free end portion that is connected to an endmost one of said receiver leadframes and that is in contact with said first rail.
Dependencies are inferred from the claim text.