Printed circuit board for harsh environments

Details Printed circuit board for harsh environments Printed circuit board for harsh environments

2008-12-03

2011-12-13

Thompson, Gregory (Department: 2835)

Electricity: conductors and insulators

Conduits, cables or conductors

Preformed panel circuit arrangement

C174S205000, C174S258000

Reexamination Certificate

active

08076587

ABSTRACT:
A printed circuit board (PCB22) capable of withstanding ultra high G forces and ultra high temperature as in a gas turbine (11). The PCB includes a substrate having a plurality of cavities (30A,36A) formed therein for receiving components of a circuit, and conductors embedded in the PCB for electrically connecting the components together to complete the circuit. Each of the cavities has a wall (36A′) upstream of the G-forces which supports the respective component in direct contact in order to prevent the development of tensile loads in a bonding layer (37A). When the component is an integrated circuit (50), titanium conductors (63) are coupled between exposed ends of the embedded conductors and contact pads on the integrated circuit. A gold paste (51) may be inserted into interstitial gaps between the integrated circuit and the upstream wall.

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