Cooling Plate Coupling for Electron Beam Semiconductor Analysis
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Solution Overview
Problem
Legacy photonics-based processes struggle to penetrate multiple metal layers in semiconductor devices to assess transistor quality and operational characteristics, as light cannot effectively pass through these layers to detect defects or faults.
Innovation Solution
An enclosure system with a thermally conductive cooling plate and backing plate is used to expose semiconductor device layers to an electron beam, allowing secondary electrons to be analyzed for operational characteristics, while maintaining a vacuum and controlling temperature, thereby facilitating defect detection and fault analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Difficulty of detecting and measuring
If photonics-based processes are used to detect defects, then the detection method is simple and non-contact, but light cannot penetrate multiple metal layers to reach transistor layers
Solution Approach 1:
The patent introduces an electron beam as an intermediary detection method that can penetrate metal layers where photons fail. The electron beam interacts with the semiconductor device through the metal layers to generate secondary electrons that carry information about the transistor operation, effectively mediating the detection process through the blocking metal layers.
Solution Approach 2:
The patent replaces the optical detection system (photons) with an electron beam-based detection system. This substitution enables penetration through metal layers by using electron interactions rather than light transmission, fundamentally changing the detection mechanism from optical to electronic.
2Difficulty of detecting and measuring
If electron beam analysis is used to penetrate metal layers, then detection effectiveness improves, but the system complexity increases due to vacuum requirements and temperature control
Solution Approach 1:
The patent merges multiple functions into a single integrated system: the thermally conductive plate simultaneously provides thermal management for the semiconductor device and serves as a structural component of the vacuum chamber. The enclosure integrates vacuum sealing, thermal control, and electron beam access into one unified structure, reducing overall system complexity despite the advanced capabilities.
Solution Approach 2:
The thermally conductive plate performs multiple functions: it acts as a heat sink for temperature control, provides structural support for the vacuum chamber, and serves as a mounting surface for the semiconductor device. This multi-functionality reduces the number of separate components needed, offsetting the complexity introduced by electron beam analysis requirements.
3Measurement precision
If the semiconductor device is exposed to electron beam, then operational characteristics can be detected, but heat generation requires active cooling
Solution Approach 1:
The patent implements preliminary thermal management by providing active cooling through the thermally conductive plate before the electron beam exposure causes excessive heating. The cooling system is pre-configured and operational, preventing temperature rise rather than reacting to it, ensuring stable operating conditions during measurement.
Solution Approach 2:
The thermally conductive plate acts as a thermal intermediary between the semiconductor device and the cooling system. It efficiently conducts heat away from the device while allowing the electron beam to interact with the device for measurement, mediating between the measurement process and thermal management requirements.
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 approach enables effective detection of operational characteristics and fault analysis in semiconductor devices by exposing transistor layers to electron beams, overcoming the limitations of light-based methods in penetrating metal layers, thus improving defect identification and quality assessment.
Implementation Method 1
a thermally conductive cooling plate... thermally coupled with the semiconductor device to control the temperature of the semiconductor device
Implementation Method 2
expose a portion of the semiconductor device to an electron beam, such that secondary electrons are analyzed to determine operational characteristics
Data Source
AI summary
Embodiments described herein may be related to apparatuses, processes, systems, and/or techniques for an enclosure, which may be referred to as a cartridge, that surrounds a semiconductor device prior to the semiconductor device being bombarded with an electron beam during operational testing. In embodiments, the enclosure may include a cooling plate that includes a thermal cooling mechanism that is thermally coupled with the semiconductor device to control the temperature of the semiconductor device during testing. The thermal cooling mechanism may include a manifold that extends through the plate through which a cooled fluid, cooled air, or some other cool material may be circulated to cool the semiconductor device. Other embodiments may be described and/or claimed.