Substrates and heat spreaders for heat management and RF isolation in integrated semiconductor devices having phase-change material (PCM) radio frequency (RF) switches
First Claim
1. A semiconductor device including an electrically conductive or semiconductive substrate, said semiconductor device further comprising:
- at least one integrated passive device (IPD);
a phase-change material (PCM) radio frequency (RF) switch comprising;
a heating element;
a PCM situated over said heating element;
PCM contacts situated over passive segments of said PCM;
said heating element extending transverse to said PCM, a heater line of said heating element approximately underlying an active segment of said PCM;
said at least one IPD situated adjacent to or above said PCM RF switch in said semiconductor device;
said PCM RF switch being situated over an electrically insulative heat spreader, said electrically insulative heat spreader dissipating heat generated by said heating element;
said electrically insulative heat spreader being situated over an electrically insulating layer, said electrically insulating layer being situated over said electrically conductive or semiconductive substrate;
said electrically insulating layer and said electrically insulative heat spreader reducing RF noise coupling in said electrically conductive or semiconductive substrate between said PCM RF switch and said at least one IPD.
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Accused Products
Abstract
A semiconductor device includes a substrate, an integrated passive device (IPD), and a phase-change material (PCM) radio frequency (RF) switch. The PCM RF switch includes a heating element, a PCM situated over the heating element, and PCM contacts situated over passive segments of the PCM. The heating element extends transverse to the PCM, with a heater line underlying an active segment of the PCM. The PCM RF switch is situated over a heat spreader that is situated over the substrate. The heat spreader and/or the substrate dissipate heat generated by the heating element and reduce RF noise coupling between the PCM RF switch and the IPD. An electrically insulating layer can be situated between the heat spreader and the substrate. In another approach, the PCM RF switch is situated over an RF isolation region that allows the substrate to dissipate heat and that reduces RF noise coupling.
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Citations
19 Claims
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1. A semiconductor device including an electrically conductive or semiconductive substrate, said semiconductor device further comprising:
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at least one integrated passive device (IPD); a phase-change material (PCM) radio frequency (RF) switch comprising; a heating element; a PCM situated over said heating element; PCM contacts situated over passive segments of said PCM; said heating element extending transverse to said PCM, a heater line of said heating element approximately underlying an active segment of said PCM; said at least one IPD situated adjacent to or above said PCM RF switch in said semiconductor device; said PCM RF switch being situated over an electrically insulative heat spreader, said electrically insulative heat spreader dissipating heat generated by said heating element; said electrically insulative heat spreader being situated over an electrically insulating layer, said electrically insulating layer being situated over said electrically conductive or semiconductive substrate; said electrically insulating layer and said electrically insulative heat spreader reducing RF noise coupling in said electrically conductive or semiconductive substrate between said PCM RF switch and said at least one IPD. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A semiconductor device including an electrically conductive or semiconductive substrate, said semiconductor device further comprising:
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at least one integrated passive device (IPD); a phase-change material (PCM) radio frequency (RF) switch comprising; a heating element; a PCM situated over said heating element; a heater line of said heating element approximately underlying said PCM; said at least one IPD situated adjacent to or above said PCM RF switch in said semiconductor device; said PCM RF switch being situated over an electrically insulative heat spreader, said electrically insulative heat spreader dissipating heat generated by said heating element; said electrically insulative heat spreader being situated over said electrically conductive or semiconductive substrate; said electrically insulative heat spreader reducing RF noise coupling in said electrically conductive or semiconductive substrate between said PCM RF switch and said at least one IPD. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A semiconductor device including an electrically conductive or semiconductive substrate, said semiconductor device further comprising:
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at least one integrated passive device (IPD); a phase-change material (PCM) radio frequency (RF) switch comprising; a heating element; a PCM situated over said heating element; a heater line of said heating element approximately underlying said PCM; said PCM RF switch being situated over an electrically insulative heat spreader; said electrically insulative heat spreader being situated over said electrically conductive or semiconductive substrate. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification