Radiographic detector with heat sink
A digital radiographic detector includes a multi-layered core having integrated circuits generating heat within a housing of the detector. A thermally conductive component that is configured to provide a distinct function for the core is thermally coupled to the integrated circuits to also serve as a heat sink therefor.
1. A digital radiographic detector comprising:
a multi-layered core comprising:
a two-dimensional array of photo-sensitive cells,
an integrated circuit chip in electrical communication with the array of photo-sensitive cells,
a printed circuit board in electrical communication with the integrated circuit chip, and
an electrically conductive plate made from a metal, the electrically conductive plate having a standoff integrally formed therewith, the standoff extending from the electrically conductive plate to the printed circuit board and electrically connected to the printed circuit board to provide an electrical ground plane for the printed circuit board, the electrically conductive plate further having a thermal extension integrally formed therewith, the thermal extension extending from the electrically conductive plate to the integrated circuit chip to provide a thermal exit path for heat generated by the integrated circuit chip; and
a housing to enclose the multi-layered core.
2. The detector of claim 1 , wherein the thermal extension of the electrically conductive plate comprises a raised extension formed by machining of the conductive plate.
3. The detector of claim 1 , wherein the housing comprises a greater thermal resistance than the electrically conductive plate.
4. The detector of claim 1 , further comprising a thermally conductive pad adhered to the integrated circuit chip and abutting the thermal extension of the electrically conductive plate.
5. The detector of claim 4 , wherein the electrically conductive plate is configured as a support layer for the two-dimensional array of photo-sensitive cells or a support structure for the multi-layered core.
6. A digital radiographic detector comprising:
a multi-layered core comprising a two-dimensional array of photo-sensitive cells, circuitry in electrical communication with the array of photosensitive cells, and a grounding member configured to provide a ground plane for the circuitry in electrical communication with the array of photo-sensitive cells;
a housing to enclose the multi-layered core; and
a thermally conductive member in thermal communication with both the circuitry in electrical communication with the array of photo-sensitive cells and the grounding member, wherein the grounding member comprises an electrically conductive plate.
7. A digital radiographic detector comprising:
a multi-layered core comprising:
a two-dimensional array of photo-sensitive cells,
an integrated circuit chip in electrical communication with the array of photosensitive cells,
a printed circuit board in electrical communication with the integrated circuit chip, and
a shield layer made from a metal configured to provide a shielding function for the detector, the shield layer comprising a thermal extension integrally and continuously formed therewith, the thermal extension continuously extending from the shield layer to the integrated circuit chip to provide a thermal exit path for heat generated by the integrated circuit chip; and
a housing to enclose the multi-layered core.
8. The detector of claim 7 , further comprising a thermally conductive flexible pad configured to abut the integrated circuit chip and the thermal extension to establish a thermally conductive path therebetween.
9. The detector of claim 8 , wherein the thermal extension comprises a raised section of the shield layer integrally formed in the shield layer by a machining process.
10. The detector of claim 8 , wherein the housing comprises a greater thermal resistance than the thermal extension and the thermally conductive flexible pad.
11. The detector of claim 7 , wherein the shield layer is configured as an electromagnetic interference shield or an x-ray shield.
12. The detector of claim 7 , wherein the shield layer further comprises a standoff integrally formed therewith, the standoff extending from the shield layer to the printed circuit board and electrically connected to the printed circuit board to provide an electrical ground plane for the printed circuit board.