Passive Components as Thermal Capacitance and Heat Sink
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Solution Overview
Problem
As semiconductor devices shrink, they experience increased thermal loading, which poses challenges for heat management within printed circuit boards (PCBs), affecting circuit performance and device longevity.
Innovation Solution
Strategically placing passive components on the PCB surfaces to conduct heat away from the chip die, either through direct contact, thermal capacitance, or by forming a heat sink, optimizing thermal performance without using conventional heat sinks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If semiconductor device size is reduced to improve integration density, then circuit efficiency is maintained or improved, but thermal loading per unit area increases
Solution Approach 1:
The patent merges the electrical function and thermal management function into a single integrated structure. Passive components (capacitors, inductors, resistors) are designed to serve both their electrical circuit function and as thermal pathways, conducting heat away from the high-density circuit elements they are electrically connected to.
Solution Approach 2:
Passive components are designed with multi-functionality, serving both as electrical components in the circuit and as thermal management elements. The same component structures that provide electrical capacitance, inductance, or resistance also provide thermal conduction pathways, eliminating the need for separate dedicated thermal management components.
2Temperature
If conventional heat sinks are used to manage thermal loading, then heat dissipation is improved, but device complexity and footprint increase
Solution Approach 1:
The patent eliminates separate heat sink structures by merging thermal management functionality into the existing passive components. The passive components themselves become the thermal conduction pathways, removing the need for additional dedicated heat dissipation structures and reducing overall device complexity.
Solution Approach 2:
Passive components serve their own thermal management needs and those of adjacent active components through their inherent material properties and structural design. The components conduct heat away from themselves and neighboring high-density circuit elements as part of their normal operational structure, without requiring external thermal management systems.
3Temperature
If passive components are strategically placed to conduct heat away, then thermal dissipation is enhanced, but circuit layout complexity increases
Solution Approach 1:
The strategic placement of passive components achieves dual optimization: electrical circuit performance and thermal management. By positioning these multi-functional components at locations that are both electrically optimal and thermally advantageous, the design simultaneously satisfies electrical connectivity requirements and heat conduction pathways without requiring separate optimization processes.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enhances thermal dissipation, improving the cooling capacity and efficiency of chip dies embedded within PCBs, thereby maintaining predictable circuit performance and extending device lifespan.
Implementation Method 1
the passive components may be arranged to conduct heat generated by the chip die away from the chip die
Implementation Method 2
a passive component is located such that it forms a thermal capacitance with respect to the chip die
Implementation Method 3
a passive component is located such that it forms a heat sink with respect to the chip die
Data Source
AI summary
Representative implementations of devices and techniques provide improved thermal performance of a chip die disposed within a layered printed circuit board (PCB). Passive components may be strategically located on one or more surfaces of the PCB. The passive components may be arranged to conduct heat generated by the chip die away from the chip die.