US12550615 - Semiconductor bridge coupled with one or more thermistors and the method of the same

The patent describes a detonator for explosive materials that utilizes a semiconductor bridge with a polysilicon resistor and one or more thermistors to manage heat generation. The thermistors sense temperature changes and divert current away from the polysilicon resistor when a critical temperature is reached, preventing overheating and ensuring controlled ignition of the explosive material.

Claim 1

1 . A detonator for an explosive material, comprising: a semiconductor bridge, coupled with the explosive material, including: a polysilicon resistor, wherein the polysilicon resistor is coupled with or in contact to the explosive material, a current flow throughout the polysilicon resistor generates heat, the heat is accumulated over time and ignite the explosive material when the heat exceeds a threshold for the polysilicon resistor; one or more thermistors disposed in parallel next to the polysilicon resistor and sensing the heat, resistance of the thermistors drops drastically when the heat exceeds a threshold for the thermistors, wherein the current flow is diverted from the polysilicon resistor to the thermistors so as to reduce the heat being generated in the polysilicon resistor, the threshold for the thermistors is lower than the threshold for the polysilicon resistor; and an insulate layer, where the polysilicon resistor and the at least two thermistors are precisely arranged in parallel across two spaced conductive pads and on top of the insulating layer and isolated from each other. a semiconductor bridge, coupled with the explosive material, including: a polysilicon resistor, wherein the polysilicon resistor is coupled with or in contact to the explosive material, a current flow throughout the polysilicon resistor generates heat, the heat is accumulated over time and ignite the explosive material when the heat exceeds a threshold for the polysilicon resistor; one or more thermistors disposed in parallel next to the polysilicon resistor and sensing the heat, resistance of the thermistors drops drastically when the heat exceeds a threshold for the thermistors, wherein the current flow is diverted from the polysilicon resistor to the thermistors so as to reduce the heat being generated in the polysilicon resistor, the threshold for the thermistors is lower than the threshold for the polysilicon resistor; and an insulate layer, where the polysilicon resistor and the at least two thermistors are precisely arranged in parallel across two spaced conductive pads and on top of the insulating layer and isolated from each other. a polysilicon resistor, wherein the polysilicon resistor is coupled with or in contact to the explosive material, a current flow throughout the polysilicon resistor generates heat, the heat is accumulated over time and ignite the explosive material when the heat exceeds a threshold for the polysilicon resistor; one or more thermistors disposed in parallel next to the polysilicon resistor and sensing the heat, resistance of the thermistors drops drastically when the heat exceeds a threshold for the thermistors, wherein the current flow is diverted from the polysilicon resistor to the thermistors so as to reduce the heat being generated in the polysilicon resistor, the threshold for the thermistors is lower than the threshold for the polysilicon resistor; and an insulate layer, where the polysilicon resistor and the at least two thermistors are precisely arranged in parallel across two spaced conductive pads and on top of the insulating layer and isolated from each other.

Google Patents

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USPTO PDF

https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/12550615