Semiconductor Package Terminal Segmentation for Test Mode Security
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Solution Overview
Problem
Conventional semiconductor packages lack adequate security features and require customization of test equipment for testing, which complicates the testing process.
Innovation Solution
A semiconductor package design with main terminals arranged at constant intervals, including separate sets for test signals and other signals, along with dummy terminals, allowing for easy switching between test modes without the need for customizing test equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate terminal sets for test signals and other signals are provided, then security is improved and test mode switching is enabled, but device complexity increases
Solution Approach 1:
The terminal set is divided into a first terminal set for test signals and a second terminal set for other signals. This segmentation enables secure test mode operation by physically separating test functionality from normal operation terminals, while the separation itself provides the security mechanism rather than adding complex access control systems.
Solution Approach 2:
The first terminal set serves dual purposes: it enables test mode switching through predetermined signals and provides secure test signal input. This multi-functionality improves security and enables test mode capability without requiring separate dedicated components for each function, thereby managing device complexity.
2Adaptability or versatility
If customizing of test equipment is required, then testing capability is improved, but ease of operation deteriorates
Solution Approach 1:
The semiconductor package is pre-configured with a dedicated first terminal set for test signals and includes internal logic to recognize predetermined test mode switching signals. This preliminary configuration eliminates the need for customizing test equipment during operation, as the package is already prepared to accept standard test equipment and switch modes automatically based on input signals.
Solution Approach 2:
The semiconductor package autonomously handles test mode switching by monitoring its own terminal inputs for predetermined signals and automatically transitioning between test and normal modes. This self-service capability removes the need for external customization of test equipment, improving ease of operation while maintaining versatile testing capability.
Data Source
AI summary
Provided are a semiconductor package, a semiconductor memory module including the semiconductor package, and a system including the semiconductor memory module. The semiconductor package may include a plurality of main terminals arranged on a surface of the semiconductor package with constant intervals, and the plurality of main terminals may include terminals of a first set including a plurality of input/output terminals to which test signals may be input, and terminals of a second set including a plurality of input/output terminals to/from which signals other than the test signals may be input/output.