Jig with Verification Aperture for Substrate Position Teaching
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Solution Overview
Problem
Current methods for teaching substrate handling in semiconductor processing systems are inefficient due to the reliance on expensive camera substrates and limited accuracy when using dummy silicon substrates, which prolongs tool qualification and reduces availability.
Innovation Solution
A jig with a verification pin and disc body is used to teach transfer positions and centering in semiconductor processing systems, featuring a verification aperture and optional lightening apertures and friction members to improve accuracy and reduce misregistration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If camera substrates are used to teach transfer positions, then accuracy of position teaching is improved, but cost increases and periodic calibration is required
Solution Approach 1:
The patent replaces expensive camera substrates with a disposable dummy substrate that has a verification aperture pattern. This dummy substrate can be easily manufactured and discarded after use, eliminating the need for costly camera substrates while maintaining teaching accuracy. The verification aperture provides a precise geometric reference that enables accurate position teaching without requiring expensive materials.
Solution Approach 2:
The patent creates a simplified copy of the substrate handling process using a dummy substrate with verification apertures instead of real camera substrates. The verification aperture pattern replicates the essential geometric features needed for position teaching, allowing the system to learn transfer positions accurately without using the actual expensive camera substrates.
2Quantity of substance
If dummy silicon substrates are used to teach transfer positions by matching to scribing, then cost is reduced, but accuracy is limited by observer skill
Solution Approach 1:
The patent replaces the manual mechanical method of matching dummy substrates to scribing with an automated optical verification system. The verification aperture in the dummy substrate provides a precise geometric target that can be automatically detected and measured by sensors, eliminating the need for human observers and their subjective judgment. This substitution of manual mechanical alignment with automated optical measurement significantly improves accuracy.
Solution Approach 2:
The verification aperture in the dummy substrate provides a distinct visual feature that can be easily detected by optical sensors. The aperture creates a clear contrast pattern that enables automated detection systems to precisely identify the verification location, replacing the need for human visual inspection and improving measurement accuracy.
3Quantity of substance
If dummy silicon substrates are used to teach centering positions, then cost is reduced, but accuracy is limited by slippage or shifting during transport
Solution Approach 1:
The patent incorporates the verification aperture pattern into the dummy substrate before transport. This pre-established geometric reference remains fixed relative to the substrate, allowing the system to accurately determine centering positions based on the known aperture location rather than relying on the substrate's physical stability during transport. The verification aperture serves as a predetermined reference that compensates for any transport-induced shifts.
4Measurement precision
If periodic calibration of camera substrates is performed, then accuracy is maintained, but tool availability decreases
Solution Approach 1:
The patent uses a disposable dummy substrate with verification aperture that does not require periodic calibration. Unlike camera substrates that degrade and need recalibration, the dummy substrate with its built-in verification aperture provides a stable, permanent reference that remains accurate throughout its use. This eliminates the need for periodic calibration interruptions and maintains tool availability.
Data Source
AI summary
A jig for teaching substrate handling in a semiconductor processing system includes a verification pin with a pin width and a disc body. The disc body has a first surface, a second surface opposite the first surface, and a thickness separating the second surface from the first surface of the disc body. The first and second surfaces define a verification aperture coupling the first surface to the second surface of the disc body. The verification aperture has an aperture width equivalent to the pin width of the verification pin to teach a transfer position by slidably receiving the verification pin in the verification aperture and a verification pin seat defined in a load lock of the semiconductor processing system while supported by a substrate transfer robot within the semiconductor processing system. Semiconductor processing systems and methods of teaching substrate handling in semiconductor processing systems are also described.