Oxide Semiconductor Inspection Probe for Low-Carrier Detection
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Solution Overview
Problem
Conventional two-point methods struggle to accurately detect the electrical characteristics of oxide semiconductor layers due to low intrinsic carrier concentration and fine detection currents.
Innovation Solution
A semiconductor film layer inspection apparatus that applies energy to form an excited state in the oxide semiconductor layer, increasing carrier concentration, and uses a detection unit with multiple probe pins and a carrier generator to enhance detection accuracy and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional two-point inspection method is used to detect electrical characteristics of an oxide semiconductor layer, then the inspection process is simple, but the detection accuracy is low due to low intrinsic carrier concentration and fine detection current
Solution Approach 1:
The carrier generator is activated before the detection process to pre-increase the carrier concentration in the oxide semiconductor layer. This preliminary action ensures that when detection occurs, sufficient carriers are available to produce measurable current signals, thereby improving detection accuracy without requiring complex amplification systems during the measurement phase.
Solution Approach 2:
The invention changes the physical parameter of carrier concentration in the oxide semiconductor layer by applying energy from the carrier generator. This parameter change transforms the material from a low-carrier state (undetectable) to a high-carrier state (detectable), enabling accurate electrical characteristic measurement while maintaining a relatively simple inspection system architecture.
2Measurement precision
If energy is applied to increase carrier concentration in the oxide semiconductor layer, then detection accuracy improves, but energy consumption increases
Solution Approach 1:
The carrier generator operates periodically rather than continuously - activating only before and during the detection phase to increase carrier concentration, then deactivating when detection is complete. This periodic operation achieves the necessary carrier concentration increase for accurate measurement while minimizing overall energy consumption by avoiding continuous energy application.
3Reliability
If the detection unit contacts multiple points on the oxide semiconductor layer, then measurement reliability improves, but the risk of contact resistance increases
Solution Approach 1:
The invention replaces direct mechanical contact between detection probes and the oxide semiconductor layer with a field-based detection approach. The detection unit measures electrical characteristics through the substrate without requiring physical contact with the delicate oxide semiconductor layer, thereby eliminating contact resistance issues while maintaining measurement reliability through non-contact sensing methods.
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 achieves more accurate and reliable detection of electrical characteristics by increasing carrier concentration and improving the contact structure between the detection probes and the oxide semiconductor layer, leading to enhanced data robustness and detection precision.
Implementation Method 1
applying energy to the oxide semiconductor layer to form an excited state and thus leading to an increase in the carrier concentration
Implementation Method 2
detect the electrical characteristics of the oxide semiconductor layer by applying an electrical signal
Data Source
AI summary
The present invention provides a semiconductor film layer inspection apparatus (10) for detecting the electrical characteristics of a semiconductor film layer (30) formed on one surface of a substrate (20) and including an oxide semiconductor layer (31), and a detection unit used therein. The apparatus includes a base unit (40), a detection unit (200) and a carrier generator (300 300a and 300b). The detection unit (200) includes: a detection probe pin (230) and a detection probe module (202). The detection probe pin (230) includes a detection probe pin body (231) and a detection probe pin contactor unit (233). The detection probe pin contactor unit at least partially forms a plurality of independently detectable and operable segmented pin contactor unit blocks.