Semiconductor Memory Bonding Pad Mode Signal Generation
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Solution Overview
Problem
Conventional semiconductor memory apparatuses require multiple bonding pads to designate different operation modes, including X4, X8, X16 input/output modes, and wafer burn-in test modes, which increases complexity and reduces productivity.
Innovation Solution
A semiconductor memory apparatus with a reduced number of bonding pads, utilizing an operation mode signal generation unit that generates mode signals based on input signals from a single bonding pad and either an address or strobe pad, allowing for determination of multiple operation modes without the need for multiple pads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple bonding pads are used to designate different operation modes, then the operation modes can be clearly designated, but the device complexity and number of bonding pads increase
Solution Approach 1:
The bonding pad is configured to perform multiple functions: it can receive bonding signals for mode designation (PADX4, PADX8) and also serve as a control signal pad for receiving control signals during normal operation. This multi-functionality allows the same physical pad to support both wafer burn-in test mode designation and regular operation, eliminating the need for separate dedicated pads for each function.
Solution Approach 2:
The patent merges the functionality of separate bonding pads for mode designation with the control signal pad functionality into a single integrated bonding pad structure. The control signal pad is designed to accept either bonding signals (when used for mode designation) or control signals (when used for normal operation), combining what would traditionally require multiple separate pads into one unified component.
2Adaptability or versatility
If multiple bonding pads are used to designate operation modes, then different modes can be distinguished, but the manufacturing process becomes more complex and productivity decreases
Solution Approach 1:
By making the bonding pad universal - capable of receiving both bonding signals for mode designation and control signals for normal operation - the patent simplifies the manufacturing process. Fewer pads mean fewer bonding operations required during wafer burn-in testing, directly improving productivity while maintaining the ability to differentiate between various operation modes through signal interpretation.
Data Source
AI summary
A semiconductor memory apparatus may include a bonding pad; a control signal pad; and an operation mode signal generation unit configured to generate a plurality of operation mode signals in response to a bonding signal inputted through the bonding pad and a control signal inputted through the control signal pad.