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Roland, do you mean the thermal resistance of the complete package?
The anodized heat sink is in contact with the PCB, I presume. What kind of thermal interface material is between the heat sink and the PCB? The heat sink is adjacent to the ENIG- 30-micron Cu?
Sometimes Technetters post or improvise pictures of the layup. At best, your question is a challenging one. Bonne chance....Louis Hart
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Roland Jaquet
Sent: Tuesday, April 22, 2014 4:06 AM
To: [log in to unmask]
Subject: [TN] Seeking : Thermal Resistance onto PCB surface
Dear Technetters,
I am confronted to an unusual challenge I am not able to solve. Can someone help, if you please
We are seeking : Thermal Resistance onto PCB surface (14 layers) standard approx.. 1.8 mm thick
Between
External Cu of approximately 30 to 35 metric microns covered with ENIG
And
Aluminum "Alodinized" 1200 or Anodized in black
Thank you for your help
Meilleures salutations
Best Regards
Roland
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