A method and structure for attaching a lead frame to a heat sink are provided. In one embodiment, a layer of thermally conductive, electrically insulating epoxy is formed on a heat sink and the epoxy layer is fully cured. A thermoplastic adhesive layer is formed on the epoxy layer, and the heat sink is clamped to the lead frame such that the thermoplastic layer contacts the lead frame. The thermoplastic layer is heated to its melting point and then cooled, thereby joining the heat sink and the lead frame. In a variation, a partially cured B-stage epoxy layer is used to replace the thermoplastic layer. The B-stage epoxy layer is fully cured to connect the lead frame to the heat sink.
Structure For Attaching A Lead Frame To A Heat Spreader/Heat Slug Structure
Boonmi Mekdhanasarn - Sunnyvale CA Daniel P. Tracy - San Jose CA
Assignee:
National Semiconductor Corporation - Santa Clara CA
International Classification:
H01L 23495 H01L 2348
US Classification:
257675
Abstract:
A method and structure for attaching a lead frame to a heat sink are provided. In one embodiment, a layer of thermally conductive, electrically insulating epoxy is formed on a heat sink and the epoxy layer is fully cured. A thermoplastic adhesive layer is formed on the epoxy layer, and the heat sink is clamped to the lead frame such that the thermoplastic layer contacts the lead frame. The thermoplastic layer is heated to its melting point and then cooled, thereby joining the heat sink and the lead frame. In a variation, a partially cured B-stage epoxy layer is used to replace the thermoplastic layer. The B-stage epoxy layer is fully cured to connect the lead frame to the heat sink.
Mind Research Institute Oct 2014 - Jan 2017
Education Consultant
Mind Research Institute Oct 2014 - Jan 2017
Sales Enablement : Curriculum Specialist
Aisleng Oct 2014 - Jan 2017
Cvo and Co-Founder
Independent Instructional Designer Sep 2013 - Oct 2014
Consultant
Tntp 2013 - 2014
Mathematics Video Coach
Education:
Northern Kentucky University 2010 - 2012
Masters, Master of Arts, Mathematics, Education
Northern Kentucky University 2006 - 2010
Bachelors, Bachelor of Science, Mathematics
Skills:
Data Analysis Strategic Planning Public Speaking Instructional Design Staff Development Google Analytics Creative Problem Solving Team Facilitation Microsoft Office Knowledge Sharing Seo Presentation Development Self Starter Sas Servant Leadership Strategic Marketing Consultancy Sales Enablement
Interests:
Building Motorcycles Inventing Running Statistical Analysis Environmental Energy Research Database Programming Passive Energy
Immaculate Conception School Watertown SD 1974-1978
Community:
Nichole Mcbrien, Judy Endres, Michael Bugeja, Jill Swanson, Marie Stecker, Mark Kienast, William O'hara, Teresa Grorud, Loretta Conejo, Kayla Weyh, Adam Kranz, Laurie Devries