Semiconductor Package Shared Electrostatic Protection Circuit
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Solution Overview
Problem
Conventional solid state drives face increased capacitance and power consumption due to electrostatic protection circuits being mounted on each semiconductor chip, which reduces operating frequency when external terminals are shared among multiple chips.
Innovation Solution
Implementing an electrostatic protection circuit on only one semiconductor chip per group, with other chips connected directly to the internal circuits without the protection circuit, to share a single external terminal, thereby reducing added capacitance without compromising protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electrostatic protection circuits are mounted on each semiconductor chip, then electrostatic protection function is improved, but capacitance at external terminals increases and power consumption increases
Solution Approach 1:
Multiple semiconductor chips share a common electrostatic protection circuit through a shared pad electrode, merging the protection function across chips. This allows one protection circuit to serve multiple chips, reducing total capacitance and power consumption while maintaining protection coverage.
Solution Approach 2:
A single electrostatic protection circuit is designed to protect multiple semiconductor chips simultaneously, giving it multi-functionality. The shared pad electrode enables one protection circuit to serve as a universal protection point for several chips sharing external terminals.
2Reliability
If electrostatic protection circuits are mounted on each semiconductor chip, then electrostatic protection function is improved, but operating frequency is reduced
Solution Approach 1:
Multiple semiconductor chips share a common electrostatic protection circuit through a shared pad electrode, merging the protection function across chips. This allows one protection circuit to serve multiple chips, reducing total capacitance and power consumption while maintaining protection coverage.
3Device complexity
If data lines and address lines share one external terminal among multiple semiconductor chips, then number of external terminals is reduced, but capacitance at external terminals increases
Solution Approach 1:
Multiple semiconductor chips share a common electrostatic protection circuit through a shared pad electrode, merging the protection function across chips. This allows one protection circuit to serve multiple chips, reducing total capacitance and power consumption while maintaining protection coverage.
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 reduces capacitance at external terminals, minimizing power consumption and maintaining effective electrostatic protection across multiple semiconductor chips sharing terminals.
Implementation Method 1
To prevent electrostatic breakdown due to static electricity in an internal circuit
Implementation Method 2
such an electrostatic protection circuit is constituted by a large diode because the circuit is required to be resistant to high current generated due to the discharge of the static electricity
Data Source
AI summary
On a single semiconductor package PK1, m semiconductor chips CP1 to CPm are mounted, and the semiconductor package PK1 has external terminals T shared by m pad electrodes PD1 to PDm of the m semiconductor chips CP1 to CPm. An electrostatic protection circuit CD is mounted on only one CPm of the m semiconductor chips CP1 to CPm.