Temperature regulation of integrated circuit elements

Patent metadata

Field	Value
Publication number	US-2025063635-A1
Application number	US-202318449219-A
Country	US
Kind code	A1
Filing date	Aug 14, 2023
Priority date	Aug 14, 2023
Publication date	Feb 20, 2025
Grant date	—

Abstract

A semiconductor package, comprising: a substrate; an analog circuitry that is formed on the substrate; a first heating element that is formed on the substrate; a first temperature sensing element that is formed on the substrate; a first heating control circuitry that is formed on the substrate, the first heating control circuitry being configured to detect whether a first temperature measurement that is taken with the first temperature sensing element is below a first threshold, and turn on the first heating element in response to detecting that the first temperature measurement is below the first threshold, the first heating element being turned on only when the first temperature measurement is below the first threshold; and an encapsulating material configured to encapsulate the substrate, the analog circuitry, the first temperature sensing element, the first heating element, and the first heating control circuitry.

First claim

1 . A sensor package comprising:
a substrate; a sensing element that is formed on the substrate; a digital processing circuitry that is formed on the substrate, the digital processing circuitry being configured to generate an output signal based on a signal that is generated at least by the sensing element; a temperature sensing element that is configured to measure a temperature inside the sensor package; one or more heating elements that are configured to heat at least the sensing element; a heating control circuitry that is configured to: receive a temperature measurement that is at least in part generated by the temperature sensing element, detect whether the temperature measurement is below a first threshold, and turn on the one or more heating elements when the temperature measurement is below the first threshold, the one or more heating elements being turned on only when the temperature measurement is below the first threshold; and an encapsulating material that is configured to encapsulate the substrate, the temperature sensing element, the digital processing circuitry, the one or more heating elements, and the heating control circuitry.

2 . The sensor package of claim 1 , wherein the one or more heating elements are provided in the sensor package exclusively for generating heat.

3 . The sensor package of claim 1 , wherein any of the heating elements includes one or more resistors.

4 . The sensor package of claim 1 , wherein at least one of the heating elements includes a first portion and a second portion, the first portion being configured to generate a first magnetic field and the second portion being configured to generate a second magnetic field that at least partially cancels the first magnetic field.

5 . The sensor package of claim 1 , wherein the one or more heating elements include a conductive trace.

6 . The sensor package of claim 1 , wherein the one or more heating elements include a conductive trace that is arranged to define a loop that at least partially surrounds the one or more heating elements.

7 . The sensor package of claim 1 , wherein the sensing element includes one or more of a magnetic field sensing element, an optical sensing element, or an acoustic sensing element.

8 . The sensor package of claim 1 , further comprising an analog circuitry that is formed on the substrate, the analog circuitry being configured to process the signal that is generated by the sensing element, the one or more heating elements being further configured to heat the analog circuitry.

9 . A semiconductor package, comprising:
a substrate; an analog circuitry that is formed on the substrate; a first heating element that is formed on the substrate; a first temperature sensing element that is formed on the substrate; a first heating control circuitry that is formed on the substrate, the first heating control circuitry being configured to detect whether a first temperature measurement that is taken with the first temperature sensing element is below a first threshold, and turn on the first heating element in response to detecting that the first temperature measurement is below the first threshold, the first heating element being turned on only when the first temperature measurement is below the first threshold; and an encapsulating material configured to encapsulate the substrate, the analog circuitry, the first temperature sensing element, the first heating element, and the first heating control circuitry.

10 . The semiconductor package of claim 9 , wherein:
the first heating control circuitry includes a digital control circuit and a digital-to-analog converter (DAC), the digital control circuit is configured to select a heating level for the first heating element, generate a digital signal specifying the heating level, and provide the digital signal to the DAC, and the DAC is configured to generate an analog signal based on the digital signal and power the first heating element with the analog signal.

11 . The semiconductor package of claim 9 , wherein the first heating control circuitry is further configured to detect whether the first temperature measurement is above a second threshold and turn off the first heating element in response to detecting that the first temperature measurement is above the second threshold.

12 . The semiconductor package of claim 9 , wherein the first heating element includes a resistor.

13 . The semiconductor package of claim 9 , wherein the first heating element includes a conductive trace.

14 . The semiconductor package of claim 9 , wherein the first heating element includes a conductive trace that is arranged to define a loop that runs on a periphery of the substrate.

15 . The semiconductor package of claim 9 , wherein the first heating element includes a conductive trace that is arranged to surround the analog circuitry.

16 . The semiconductor package of claim 9 , further comprising a second heating element, wherein the first heating control circuitry is further configured to turn on the second heating element in response to the first temperature measurement being below the first threshold.

17 . The semiconductor package of claim 16 , wherein the first heating element and the second heating element are disposed on opposite sides of the analog circuitry.

18 . The semiconductor package of claim 9 , further comprising a second heating element, a second heating control circuitry, and a second temperature sensing element, wherein the second heating control circuitry is configured to detect whether a second temperature measurement that is taken with the second temperature sensing element is below the first threshold and turn on the second heating element in response to detecting that the second temperature measurement is below the first threshold.

19 . The semiconductor package of claim 18 , wherein the first heating element and the second heating element are disposed on opposite sides of the analog circuitry, and the first and second temperature sensing elements are disposed on opposite sides of the analog circuitry.

20 . The semiconductor package of claim 9 , further comprising a second heating element, wherein the first heating element includes a conductive trace that is arranged to at least partially surround a first portion of the analog circuitry and the second heating element includes a second conductive that is arranged to at least partially surround a second portion of the analog circuitry.

21 . The semiconductor package of claim 9 , wherein the analog circuitry includes one or more amplifiers and one or more analog-to-digital converters.

22 . The semiconductor package of claim 9 , further comprising one or more sensing elements.

23 . The semiconductor package of claim 9 , wherein the first heating element includes a first portion and a second portion, the first portion being configured to generate a first magnetic field and the second portion being configured to generate a second magnetic field that at least partially cancels the first magnetic field.

24 . A method for use in a semiconductor package, comprising:
receiving a temperature measurement that is taken by a temperature sensing element disposed inside the semiconductor package; detecting whether the temperature measurement is below a first threshold; in response to detecting that the temperature measurement is below the first threshold, turning on a heating element that is disposed inside the s

Assignees

• Allegro Microsystems Llc

Inventors

• Fahmy Ahmed Hassan
• Cadugan Bryan

Classifications

• H10W40/10

  Arrangements for heating · CPC title

• H10W72/884

  Die-attach connectors and bond wires · CPC title

• G05D23/2034

  the sensing element being a semiconductor · CPC title

• G01K3/005 Primary

  Circuits arrangements for indicating a predetermined temperature (fire detection G08B17/00) · CPC title

• G01K1/026

  arrangements for monitoring a plurality of temperatures, e.g. by multiplexing · CPC title