Testing Apparatus Driver Optical Link Bandwidth
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Solution Overview
Problem
Conventional techniques for high-rate signal transmission and reception between a device under test and a semiconductor testing apparatus face challenges due to limited bandwidth caused by the physical length of the transmission path.
Innovation Solution
The proposed testing apparatus includes a driver and a receiver connected to the device under test, with a test signal providing section and a signal under test receiving section connected through an optical or wireless transmission path, ensuring a broader bandwidth than the direct connection between the driver/receiver and the device under test.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electrical signal transmission through a transmission line on a printed circuit board, connector, and cable is utilized, then the mechanical structure of the semiconductor testing apparatus is maintained, but the transmission path has a physical length of several tens of centimeters to one meter or more and thereby has a limited bandwidth
Solution Approach 1:
The patent introduces a driver as an intermediary component positioned close to the device under test. The driver receives test signals from the test signal providing section and transmits them electrically to the device under test. This intermediary approach allows the test signal providing section to be positioned away from the device under test (maintaining mechanical structure) while the driver maintains close proximity (ensuring short transmission path and high bandwidth).
Solution Approach 2:
The patent replaces the conventional electrical transmission path (printed circuit board, connector, cable) with optical transmission between the test signal providing section and the driver. This substitution eliminates the need for long physical electrical connections, achieving broader bandwidth while maintaining the mechanical structure of the testing apparatus.
2Productivity
If the transmission path is extended to accommodate the mechanical structure of the semiconductor testing apparatus, then the apparatus structure is maintained, but the bandwidth is limited making it difficult to transmit and receive high-rate signals
Solution Approach 1:
The driver acts as a mediator that bridges the gap between the test signal providing section (positioned away from the device) and the device under test (requiring close proximity for high-rate signals). The driver enables high-speed electrical transmission to the device while receiving signals optically from the test signal providing section, thus achieving both high productivity and reliable bandwidth.
Solution Approach 2:
The patent changes the transmission medium parameter from electrical signals over long physical paths to optical signals for the portion of the path where bandwidth is critical. This parameter change enables high-rate signal transmission by utilizing the broader bandwidth of optical transmission while maintaining compatibility with the existing mechanical structure.
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 configuration enables high-rate transmission and reception of signals by expanding the communication bandwidth, reducing power consumption, and minimizing inter-symbol interference due to waveform distortion.
Implementation Method 1
the driver and the test signal providing section may employ optical transmission therebetween
Data Source
AI summary
A testing apparatus includes a driver and a test signal providing section. The driver is connected electrically to a device under test and arranged to provide a test signal to the device under test. The test signal providing section is arranged to provide the test signal to the driver. The driver is closer than the test signal providing section to the device under test. A bandwidth of communication between the driver and the test signal providing section is broader than a bandwidth of communication between the driver and the device under test.