Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
April 7, 2009
Patent Application Number
11704997
Date Filed
February 12, 2007
Patent Primary Examiner
Patent abstract
A leadless lead-frame mainly includes a chip paddle and a plurality of leads. The chip paddle has chip disposal areas, and a grounding area surrounding the chip disposal area. The grounding area has a recession with a recession-bottom and a recession-wall connecting to the recession-bottom. An angle is formed between the recession-wall and the recession-bottom, and the angle is less than 90 degrees. The leads surround the chip paddle. The chip paddle has a cavity and the cavity has a cavity-bottom serving as the chip disposal area, and the depth of the cavity is equal to half of the thickness of the chip paddle.
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