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Thin leadless plastic chip carrier
   
Document Number
US Patent 7009286
Issued Date
March 7, 2006
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Abstract
A leadless plastic chip carrier is fabricated by selectively etching a leadframe strip to reduce a thickness of the strip at a portion thereof. Selectively masking the surface of the leadframe strip using a mask, follows selectively etching, to provide exposed areas of the surface at the portion and contact pad areas on leadframe the strip. At least one layer of metal is deposited on the exposed areas to define a die attach pad on the portion of the leadframe strip with reduced thickness and to define contact pads on the surface of the strip. At least one semiconductor die is mounted to the die attach pad, followed by wire bonding the at least one semiconductor die to ones of the contact pads. The at least one semiconductor die, the wire bonds, and the contact pads are covered with an overmold material and the leadframe strip is etched to thereby remove the leadframe strip. The leadless plastic chip carrier is singulated from the leadframe strip.
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Number of Claims:
11
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Owner
ASAT Ltd. (New Territories,HK)
Published
March 7, 2006
Application Number
10/757,508
Filed
January 15, 2004
US Classification
257/684   257/692 257/693 257/773 257/784
Int'l Classification
H01L   23/06   (20060101)  
Examiner
Attorney/Law Firm
USPTO Field of Search
257/684   257/692   257/693   257/784   257/773  
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