Simultaneous Manufacturing of Partially Shielded Pixels Using Symmetrical Masks
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Solution Overview
Problem
The existing methods for manufacturing pixel arrays with self-focusing pixels require multiple masks for each array, leading to increased manufacturing costs due to the need for different distributions of left-hand and right-hand pixels within determined cells.
Innovation Solution
A method is developed to simultaneously manufacture left-hand and right-hand pixels using a reduced number of masks by depositing insulators and metal levels with symmetrical patterns, allowing for the creation of shields and connection areas with identical masks for both pixels, thereby reducing the number of masks required from five to two or three depending on the configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple masks are used for each array to manufacture self-focusing pixels with different distributions, then the manufacturing precision and adaptability are improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The patent merges the manufacturing process for left-hand and right-hand pixels by using a single mask that defines both shield and line patterns simultaneously. This combining of previously separate mask requirements into one unified mask reduces the total number of masks needed while maintaining the ability to produce different pixel distributions through software-controlled mask positioning and orientation.
Solution Approach 2:
The mask design achieves multi-functionality by incorporating both shield and line definitions in a single mask layer. This universal mask can produce different pixel distributions (left-hand, right-hand, or mixed) by varying the positioning and orientation parameters, eliminating the need for multiple specialized masks for different distribution types.
2Manufacturing precision
If five masks are used per array configuration, then the manufacturing precision is maintained, but the productivity decreases due to increased manufacturing time and cost
Solution Approach 1:
The patent combines multiple mask deposition steps into fewer steps by using single masks that define multiple features (shields and lines) simultaneously. This merging reduces the total number of mask operations from five per array configuration to fewer steps, directly improving manufacturing efficiency while maintaining precision through careful mask design and positioning control.
Solution Approach 2:
The mask is designed in advance to contain all necessary pattern definitions (both shield and line patterns) in a single structure. This preliminary design allows the mask to perform multiple functions simultaneously during deposition, eliminating the need for sequential mask operations and thereby improving productivity without sacrificing positioning precision.
Data Source
AI summary
A method of simultaneously manufacturing First and second pixels respectively shielded on a first and on a second side are simultaneously manufactured using a process wherein a first insulator is deposited on an active area. A first metal level is deposited and defined, with a first mask, to form a shield on the first side of the first pixel and on the second side of the second pixel, and a line opposite to the shield. A second insulator is deposited, and via openings therein are defined, with a second mask. An overlying second metal level is deposited and defined, with a third mask, to form two connection areas covering the via openings on each side of the first and second pixels. The second and third masks are identical for the first and second pixels.