| http://www.w3.org/ns/prov#value | - Therefore, this base substrate 15 is fabricated from a metal plate composing a metal such as aluminum and copper, which are excellent in thermal conductivity. [0009] The insulating layer 18 serves to adhere the lead frame 13 to the base substrate 15 and serves the function of physically spacing both apart and electrically insulating therebetween with each other.
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