Power Semiconductor Test Connections for Fast High-Current Reconfiguration
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Solution Overview
Problem
The challenge of testing semiconductor components involves the need for thick, low-resistance wire connections that are stiff and inflexible, requiring significant time to change connections during different test types, especially for power semiconductor components that handle large currents.
Innovation Solution
A semiconductor-device test apparatus with a switch-circuit board, gate driver circuit, and conductor plates or rods, allowing for quick connection changes using fork plugs through partitioning walls, and incorporating noise shielding and temperature monitoring to ensure efficient and flexible testing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If thick, low-resistance wire stock is used for connection lines to handle large current, then current handling capability is improved, but flexibility and ease of connection changes deteriorate
Solution Approach 1:
The connection system is divided into multiple segments: thick wire stock for current carrying, connector bodies for connection management, and connection lines for flexibility. This segmentation allows each component to optimize its function while working together as a system.
Solution Approach 2:
Connector bodies serve as intermediaries between the thick wire stock and the device under test. These connectors handle the mechanical aspects of connection and disconnection, allowing easy reconfiguration without directly manipulating the thick, stiff wire stock.
2Reliability
If thick connection lines are used to handle several hundred amperes, then current capacity is improved, but connection reconfiguration time increases
Solution Approach 1:
The connection system separates the current-carrying function (thick wire stock) from the connection management function (connector bodies). This allows rapid reconfiguration of connections by manipulating the connector bodies rather than the thick wire stock itself.
Solution Approach 2:
The connector bodies are designed to be movable and reconfigurable, allowing dynamic changes in connection configuration. The connection lines can be routed through different paths and connected to different terminals based on testing requirements.
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
Enables rapid and flexible connection changes, reduces noise interference, and effectively monitors temperature changes in semiconductor devices, enhancing the efficiency and accuracy of lifespan testing.
Implementation Method 1
a heating/cooling plate arranged for making tight contact with a semiconductor device under test
Implementation Method 2
The switch circuits may be MOSFETs, with the MOSFETs being controlled synchronized to the signal voltage output by the gate driver circuit
Data Source
AI summary
Power semiconductor-device test apparatuses carrying out gate-signal controlled on/off switching of high-amp test current for various forms of device lifespan testing. Fork plugs or like connectors are insertable through openings of choice in walls partitioning the test apparatus interior for connection, in lieu of altering of wire-line changes, to switch circuits of choice, facilitating test-type connection changing. Sample-connection circuits, removable by means of connectors, include gate-driver, variable-resistor, constant-current, and voltage-output circuits, and via the gate driver circuits generate gate signals, adjustable via the variable-resistor circuits, shorting-circuit on/off applied to the gate terminals of devices under test. The constant-current circuit feeds a diode across the non-gate terminals of a device under test. A control circuit varies current, gate, and output voltages to set the test conditions so that device-under-test temperature will be a predetermined value.