Patent ID: 8988891
Filing Date: 2015-03-24
Classification: H01L,H05K

Abstract:
1. A micro and millimeter waves circuit, comprising: a multi-layer circuit board; a heat substrate; and a circuit module, wherein the multi-layer circuit board is opened with a window, wherein the heat substrate comprises a base, wherein the multi-layer circuit board is attached to the base, wherein the heat substrate further has a projecting part that is integrally formed with the base of the heat substrate and is made of a same material as the base, wherein the projecting part extends from the base into the window of the multi-layer circuit board, wherein the projecting part comprises a recessed groove in a center of the projecting part, wherein the circuit module is received in the window and placed in the recessed groove of the projecting part, wherein the multi-layer circuit board comprises an outer conductor layer having a micro-strip line, an inner conductor layer having a reference ground of the micro-strip line, a first insulation layer between the outer conductor layer and the inner conductor layer, and a second insulation layer between the inner conductor layer and the base of the heat substrate, wherein the circuit module is electrically connected with the outer conductor layer of the multi-layer circuit board, wherein the reference ground of the micro-strip line of the inner conductor layer is electrically connected to the projecting part such that reference ground of both the circuit module and the micro-strip line of the outer conductor layer comprises the heat substrate, wherein the heat substrate comprises a first thickness, a second thickness, and a third thickness, wherein the first thickness is less than the second thickness, wherein the second thickness is less than the third thickness, wherein a portion of the heat substrate that is adjacent to the second insulation layer comprises the first thickness, wherein a portion of the heat substrate that includes the recessed groove comprises the second thickness, and wherein a portion of the heat substrate that is adjacent to the first insulation layer comprises the third thickness.