Semiconductor Test System Self-Inspection for Memory Repair Analysis
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current semiconductor test systems lack a rapid and effective method for inspecting memory IC chips and performing memory repair analysis, leading to increased costs and difficulty in identifying equipment failures, which can result in significant losses and reputation damage.
Innovation Solution
A semiconductor test system with a self-inspection controller and memory repair analysis device that calculates and analyzes fail bit positions, stores fail and repair address information, and compares simulated data to detect abnormalities, outputting alarm signals when discrepancies are found, thereby facilitating efficient memory chip testing and repair.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional self-inspection methods are used to inspect the whole equipment including each part and subsystem, then comprehensive inspection coverage is achieved, but inspection time and cost increase significantly
Solution Approach 1:
The patent extracts the self-inspection function from the overall equipment inspection process and applies it specifically to the memory repair analysis device. By taking out the inspection capability and applying it to the critical MRA module, the system achieves reliable inspection coverage for the most important component without requiring time-consuming inspection of all equipment parts and subsystems.
Solution Approach 2:
The patent implements preliminary self-inspection of the memory repair analysis device before it is used for actual memory testing. The self-inspection controller checks the MRA device and fail address memory in advance to ensure they are functioning correctly, preventing potential failures during production and avoiding costly interruptions.
2Productivity
If memory repair analysis is performed to replace damaged memory cells, then production yield is improved, but the complexity of the test system increases
Solution Approach 1:
The self-inspection controller serves multiple functions: it controls the memory repair analysis device, manages the fail address memory, performs self-inspection of the MRA device, and coordinates the overall testing process. By making the controller multi-functional, the patent reduces the need for separate dedicated components, thereby managing system complexity while maintaining high production yield through comprehensive MRA capabilities.
3Reliability
If comprehensive inspection of all equipment parts is performed, then equipment reliability is ensured, but cost and time consumption increase
Solution Approach 1:
The patent extracts the self-inspection capability and applies it specifically to the memory repair analysis device and fail address memory, which are the critical components for ensuring production yield. This targeted approach ensures equipment reliability for the most important functions without requiring complex inspection processes for all equipment parts.
Solution Approach 2:
The memory repair analysis device performs self-inspection through the self-inspection controller to verify its own functionality before being used for memory testing. This self-service mechanism ensures reliability of the critical MRA function without requiring external inspection resources, simplifying the overall inspection process while maintaining high equipment reliability.
Data Source
AI summary
A semiconductor test system with self-inspection of memory repair analysis is disclosed, comprising a memory repair analysis device, an analysis fail memory and a self-inspection controller. The self-inspection controller controls storing a set of simulated fail bit addresses and a set of simulated repair line addresses, provided from outside, into the analysis fail memory in advance, controls the memory repair analysis device to execute a particular repair analysis operation with respect to the set of simulated fail bit addresses to produce repair line address information, and compares the repair line address information, obtained after calculation, directly with the set of simulated repair line addresses in the analysis fail memory. Thus, before physically proceeding with the operation of testing, the invention is capable of self-inspecting if there is an abnormal condition of the memory repair analysis device and the analysis fail memory contained therein.