Patent ID: 6122186
Filing Date: 2000-09-19
Classification: H02M,H05K

Abstract:
A miniature power supply and voltage regulator comprised of a ceramic substrate comprising a top surface and bottom surface, a first layer of conductive metal bonded to said top surface, and a second layer of conductive metal bonded to said bottom surface, wherein said power supply and voltage regulator is comprised of a first means for converting alternating current to direct current, a second means for converting alternating current to direct current, a means for determining the current demands of a load, and a means for delivering said current demands to said load, wherein:(a) said power supply and voltage regulator has a power handling capacity of at least 23 watts per square inch of surface area of said top surface,(b) a first heterogeneous juncture band exists between said first layer of conductive metal and said top surface,(c) a second heterogeneous juncture band exists between said second layer of conductive metal and said bottom surface,(d) each of said first heterogeneous juncture band and said second heterogeneous juncture band has a metal-wetted surface area that is at least about twice the apparent surface area of the copper overlying the juncture band and consists essentially of ceramic grains unitary with said ceramic substrate and conductive metal unitary with said copper layer and being constituted by finger-like copper protuberances unitary with the copper layer and occupying the spaces between the ceramic grains of said ceramic,(e) said ceramic substrate has a thickness of at least about 10 mils,(f) each of said first layer of conductive metal and said second layer of copper has a thickness of at least about 3.5 mils and is comprised of at least about 98 weight percent of conductive metal,(g) the thickness of each of said first layer of conductive metal and said second layer of conductive metal is at least 0.3 times as great as the thickness of said ceramic substrate,(h) said power supply and voltage regulator is comprised of a noise suppressor circuit,(i) said power supply and voltage regulator is comprised of at least six silicon controlled rectifiers,(j) said power supply and voltage regulator is comprised of a multiplicity of diodes, and(k) said silicon controlled rectifiers and said diodes are surface mountable components in bare die form.