Embedded Batteries in Glass Cores for IC Packages

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Solution Overview

Problem

Highly integrated microelectronic systems face thermal management challenges due to increased number of dies in 3D-IC stacks, and traditional organic substrates are inadequate for high-temperature processing of lithium-based batteries, limiting their incorporation in IC packages.

Innovation Solution

Implementing glass cores in package substrates with laser-assisted etching to create high-density via drills and embedding lithium-based batteries within these glass cores, which can withstand high temperature processing and provide improved performance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If traditional organic substrates are used for IC packages, then ease of manufacture is maintained, but they cannot withstand high-temperature processing of lithium-based batteries

Engineering Contradiction:

Improvewithstand temperatureVSAvoidmanufacturing compatibility

Core Design Contradiction:

TemperatureVSEase of manufacture

Solution Approach 1:

The substrate material is changed from organic to glass, fundamentally altering the thermal properties to withstand high-temperature battery processing while maintaining manufacturing feasibility through established glass substrate fabrication techniques

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The package substrate is constructed as a composite structure with a glass core layer providing thermal stability for battery integration, combining the advantages of glass (heat resistance) with other materials for electrical and mechanical performance

Inventive Principle:

Principle #40Composite materials

2Power

If lithium-based batteries are embedded in glass cores, then power delivery is enhanced, but device complexity increases

Engineering Contradiction:

Improvepower deliveryVSAvoidpackage structure

Core Design Contradiction:

PowerVSDevice complexity

Solution Approach 1:

The battery is integrated directly into the glass core layer of the package substrate, merging the power source with the structural substrate rather than adding it as a separate component, thereby enhancing power delivery while minimizing structural complexity

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The glass core layer serves multiple functions: providing structural support for the IC package, enabling high-temperature processing compatibility, and housing the embedded lithium-based battery, thereby reducing the need for separate dedicated battery housing structures

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 solution effectively addresses thermal challenges and enables the use of high-performance lithium-based batteries in IC packages, enhancing power delivery and reducing package size while maintaining high yield and bandwidth efficiency.

Implementation Method 1

laser-assisted etching to create high-density via drills

Methodology Applied

Scientific EffectLaser ablation: Laser Ablation

Data Source

PatentUS20230198058A1Embedded batteries within glass cores of package substrates

Publication Date: 2023.06.22 INTEL CORP

AI summary

Embedded batteries within glass cores are disclosed. Example apparatus include a glass core layer having opposing first and second surfaces, the glass core layer including a cavity extending from the first surface toward the second surface, and a battery including a first conductive material positioned in the cavity, a second conductive material positioned in the cavity, and an electrolyte to separate the first conductive material from the second conductive material.