my idea was to make the core as flat as possible thus making the contact area across the tim as large as possible. this will not give as good results as a system with no tim but i dont think there is a practical way for use to remove the tim altogether. the silver precipitation method can only build paper thin layers at a time so it would be very difficult to buld an entire hs. my idea was to make a heat spreader with a very flat top surface that was grown onto the die so while there is still a tim it is now between 2 surfaces that can be properly lapped so the contact area will be much larger.
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