Leadless chip carrier thermal adapter for dewar packaging
AssigneeRaytheon Company
InventorShawn Erving
Life of this patent
Estimating the term…
Abstract
A method for cooling an imaging device includes providing, by a cold finger, a cold sink to the imaging device and conducting heat from a cold shield, a sensor chip assembly and a leadless chip carrier towards the cold finger through a plurality of parallel paths. The imaging device includes a dewar assembly having a cold shield, a sensor chip assembly disposed on a leadless chip carrier (LCC) and configured to capture an infrared image, a cold finger configured to cool the dewar assembly; and a thermal adapter. The thermal adapter is configured to draw heat from the cold shield and sensor chip assembly through a plurality of parallel paths towards the cold finger.
Claims20
A dewar assembly comprising:
- a cold shield;
- a sensor chip assembly configured to capture an infrared image, the sensor chip assembly disposed on a leadless chip carrier (LCC);
- a cold finger configured to cool the dewar assembly;
- and
- a thermal adapter configured to draw heat from the cold shield and sensor chip assembly through a plurality of parallel paths towards the cold finger.
A thermal adapter comprising:
- a thermal base, the thermal base comprising a junction configured to couple to a cold finger;
- a center pedestal configured to bond to a leadless chip carrier (LCC), the center pedestal disposed on an opposite side of the thermal base from the junction;
- and
- a plurality of contact points configured to bond to respective corners of the LCC and a cold shield, wherein the thermal adapter is configured to conduct heat from the LCC and the cold shield towards the cold finger via a plurality of parallel paths.
A method for cooling an imaging device, the method comprising:
- providing, by a cold finger, a cold sink to the imaging device;
- and
- conducting, by a thermal adapter, heat from a cold shield, an optics assembly heat load and a readout integrated circuit (ROIC) heat load towards the cold finger through a plurality of parallel paths.
Dependencies are inferred from the claim text.