Heating Chuck Aperture for Substrate Stand-by Failure Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current substrate testing apparatuses face challenges in precisely detecting stand-by failures in semiconductor substrates, particularly in identifying defects like leakage currents in PN junctions or oxide films, due to limitations in heating and imaging capabilities.
Innovation Solution
A substrate testing apparatus is designed with a heating chuck that heats the substrate, a camera to photograph photon and thermal emissions, and a probe device to apply voltage, allowing for precise detection of stand-by failures by increasing emission intensities at defective portions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a heating chuck is used to heat the substrate, then the emission intensities of photons and thermal emission in defective portions are increased, but the device complexity increases due to additional heating components
Solution Approach 1:
The heating chuck combines multiple functions: it heats the substrate, supports the substrate during testing, and provides structural alignment for the testing apparatus. By merging heating, support, and positioning functions into a single integrated component, the patent achieves improved detection precision without proportionally increasing device complexity.
Solution Approach 2:
The heating chuck serves multiple purposes: thermal heating for emission enhancement, mechanical support for the substrate, and structural integration with the testing apparatus. This multi-functionality allows the system to achieve better measurement precision while avoiding the need for separate dedicated components for each function.
2Measurement precision
If a camera is positioned under the heating chuck to photograph the substrate, then the detection of stand-by failures is improved, but the device complexity increases due to additional imaging components
Solution Approach 1:
Instead of positioning the camera above the substrate (conventional approach), the patent inverts the arrangement by placing the camera underneath the heating chuck to photograph the substrate from below. This inverted configuration enables detection of stand-by failures through emission imaging while integrating the camera into the existing heating chuck structure, thereby improving detection precision without proportionally increasing complexity.
3Measurement precision
If the substrate is heated during the HEA test, then the intensities of photon emission and thermal emission are increased, but the energy consumption increases
Solution Approach 1:
The patent applies controlled heating to change the temperature parameter of the substrate during the HEA test. By adjusting the temperature parameter, the system enhances photon and thermal emission intensities in defective portions, thereby improving detection precision. The heating is applied selectively and controlledly to achieve the necessary emission enhancement while managing energy consumption.
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
The apparatus effectively detects stand-by failures by enhancing photon and thermal emission intensities at defective areas, enabling precise identification of defects such as leakage currents and contact failures.
Implementation Method 1
The heating chuck heats the substrate and has an aperture that extends through the first surface and the second surface
Implementation Method 2
a camera is under the heating chuck and photographs the substrate, which is exposed through the heating chuck aperture
Implementation Method 3
the intensities of photon emission and thermal emission in a defective portion of a substrate may be increased
Data Source
AI summary
A substrate testing apparatus configured to perform a hot electron analysis (HEA) test for analyzing a stand-by failure in a substrate includes a heating chuck having a first surface configured to support the substrate and a second surface opposite to the first surface. The heating chuck is configured to heat the substrate and has an aperture passing through the first surface and the second surface. A substrate moving device moves the substrate on the heating chuck in a lateral direction. A camera is under the heating chuck and photographs the substrate, which is exposed by the heating chuck aperture.