Invention Grant
- Patent Title: Method of fabricating low-profile footed power package
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Application No.: US16041275Application Date: 2018-07-20
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Publication No.: US10312111B2Publication Date: 2019-06-04
- Inventor: Richard K. Williams , Keng Hung Lin
- Applicant: Adventive Technology Ltd.
- Applicant Address: LU Luxembourg
- Assignee: Adventive IPBank
- Current Assignee: Adventive IPBank
- Current Assignee Address: LU Luxembourg
- Agency: Patentability Associates
- Agent David E. Steuber
- Main IPC: H01L21/44
- IPC: H01L21/44 ; H01L21/48 ; H01L21/50 ; H01L23/495 ; H01L21/56 ; H01L23/00 ; H01L23/29 ; H01L23/31 ; H01L23/367

Abstract:
A method is disclosed of fabricating a power package which includes a heat tab extending from a die pad exposed on the underside of the package, which facilitates the removal of heat from the die to the PCB or other surface on which the package is mounted. The heat tab has a bottom surface coplanar with the flat bottom surface of the die pad and bottom surface of a lead. The lead includes a horizontal foot segment, a vertical columnar segment, and a horizontal cantilever segment facing the die pad. The heat tab may also have a foot. A die containing a power device is mounted on a top surface of the die pad and may be electrically connected to the lead using a bonding wire or clip. The die may be mounted on the die pad with an electrically conductive material, and the package may also include a lead that extends from the die pad and is thus electrically tied to the bottom of the die. The result is a package with a minimal footprint that is suitable for the technique known as “wave soldering” that is used in relatively low-cost printed circuit board assembly factories.
Public/Granted literature
- US20180330968A1 Method Of Fabricating Low-Profile Footed Power Package Public/Granted day:2018-11-15
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