Inductor-Based Voltage Boosting in Heterogeneous IC Stacks
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Solution Overview
Problem
Existing semiconductor devices face challenges in efficiently boosting voltage levels while maintaining device size and reducing energy loss, as charge pumps are less energy efficient and unstable under varying load conditions.
Innovation Solution
Employing inductor-based pumps to boost voltage levels, leveraging spare space in interface dies to integrate inductors, which are more energy efficient and stable under varying loads compared to charge pumps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If charge pumps are used to boost voltage levels, then voltage boosting is achieved, but energy efficiency deteriorates and stability under varying load conditions worsens
Solution Approach 1:
The patent changes the fundamental operating parameters by transitioning from capacitive energy storage (charge pumps) to inductive energy storage (inductor-based pumps). This parameter change enables more efficient energy transfer and reduced losses during voltage boosting operations, directly addressing the energy efficiency deterioration issue while maintaining voltage boosting capability
Solution Approach 2:
The patent substitutes the electrical capacitive mechanism of charge pumps with an inductive mechanism using inductors. This substitution replaces the charge pump's capacitor-based voltage multiplication with an inductor-based voltage transformation approach, achieving superior energy efficiency and load stability
2Area of stationary object
If device size is reduced to meet market demands, then footprint is reduced, but integrating voltage boosting circuits becomes more challenging
Solution Approach 1:
The patent moves the inductor-based voltage boosting circuit from the traditional planar die layout to the vertical dimension by integrating it into the package substrate beneath the memory dies. This dimensional transition allows the voltage boosting functionality to be added without increasing the lateral footprint of the memory device, while the heterogeneous integration approach manages the complexity through modular design
Solution Approach 2:
The patent implements a nested structure where the inductor-based voltage boosting circuit is integrated into the package substrate that already contains the interface die and control logic. This nesting approach allows the voltage boosting functionality to be embedded within the existing package architecture, adding capability without proportionally increasing overall complexity
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
Inductor-based pumps provide higher output currents and stable voltages, making them more suitable for power-hungry applications and reducing energy losses and reliability issues.
Implementation Method 1
inductor-based pumps to boost voltage levels, leveraging spare space in interface dies to integrate inductors
Data Source
AI summary
Heterogeneous integrated circuits with voltage booster circuits (e.g., inductor-based pumps) and associated systems and methods, are disclosed herein. In one embodiment, a heterogeneous integrated circuit includes (a) one or more first dies of a first type and (b) a second die of a second type different from the first type. The first die(s) can be integrated with (e.g., stacked on, bonded to, interconnected with) the second die. The heterogeneous integrated circuit can further include a voltage booster circuit, such as an inductor-based pump. The inductor-based pump can (i) include an inductor positioned within the second die, (ii) include an input configured to receive a first voltage, and (iii) include an output coupled to the first die(s). The inductor-based pump can be configured to (a) boost the first voltage to a second voltage greater than the first voltage and (b) output the second voltage at the output.