Claims
- 1. A method of making a high thermal conductivity substrate for use as a heat sink comprising the steps of:
- combining diamond particles with at least one diamond flat in a sample chamber and orienting the flat parallel to the longitudinal axis of the chamber so as to increase the thermal conductivity of the resulting substrate;
- sintering the combination of diamond particles and the diamond flat under elevated temperature and pressure conditions until a unitary polycrystalline diamond composite is formed; and
- leaching the graphite from the diamond composite so as to remove undesirable electrical conductivity properties of the composite.
- 2. A method of making a high thermal conductivity substrate for use as a heat sink comprising the steps of:
- combining diamond particles of two different sizes in a sample chamber so as to increase the thermal conductivity of the resulting substrate, the size ratio being on the order of 5:1 to 100:1;
- sintering the combination of diamond particles under elevated temperature and pressure conditions until a unitary polycrystalline composite is formed; and
- leaching graphite from the diamond composite so as to remove undesirable electrical conductivity properties of the composite.
Parent Case Info
This is a continuation of application Ser. No. 612,603, filed Sept. 12, 1975, now U.S. Pat. No. 4,104,344.
US Referenced Citations (6)
Continuations (1)
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Number |
Date |
Country |
Parent |
612603 |
Sep 1975 |
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