Low-Leakage Semiconductor Device Mask Integration
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Solution Overview
Problem
The high number of masks required for manufacturing low-leakage current semiconductor devices increases manufacturing costs and limits their adoption due to increased complexity and cost.
Innovation Solution
The use of a predetermined number of masks for both semiconductor devices and low-leakage circuits, with additional masks for specific low-leakage components, allows for the production of devices with varying leakage currents on a single wafer, reducing overall mask counts and manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If additional masks are used to manufacture low-leakage current semiconductor devices, then leakage current is reduced, but manufacturing cost and device complexity increase
Solution Approach 1:
The patent merges the manufacturing process of low-leakage current devices with standard devices by combining mask patterns. The additional mask for low-leakage devices is integrated into the standard mask set, allowing both device types to be manufactured simultaneously on the same wafer using a unified mask sequence, thereby reducing overall manufacturing complexity despite the added low-leakage functionality.
Solution Approach 2:
The patent creates a universal mask set that serves multiple functions: it manufactures both standard semiconductor devices and low-leakage current devices within the same fabrication process. The additional mask is designed to be compatible with the standard mask sequence, enabling a single mask set to produce multiple device variants with different leakage characteristics without requiring separate dedicated mask sets.
2Object-generated harmful factors
If additional masks are used to manufacture low-leakage current semiconductor devices, then leakage current is reduced, but manufacturing cost increases
Solution Approach 1:
The patent combines the low-leakage device manufacturing into the existing standard device fabrication flow by integrating the additional mask into the standard mask sequence. This merging allows shared use of fabrication equipment, process steps, and wafer batches, distributing the cost of the additional mask across both device types and reducing the per-unit manufacturing cost compared to separate dedicated production lines.
Solution Approach 2:
The universal mask set enables a single fabrication process to produce multiple device variants (standard and low-leakage), maximizing equipment utilization and reducing idle capacity costs. By making the additional mask compatible with the standard process flow, the patent ensures that the incremental cost of low-leakage devices does not require proportionally higher manufacturing investment.
3Object-generated harmful factors
If different mask sets are used for standard and low-leakage devices, then device performance is optimized, but productivity decreases due to separate manufacturing processes
Solution Approach 1:
The patent merges separate manufacturing processes into a unified flow by combining the additional low-leakage mask with the standard mask sequence. Both device types are fabricated simultaneously on the same wafer through the same process steps, eliminating the need for separate production lines and enabling parallel manufacturing that increases overall throughput and productivity.
Solution Approach 2:
The universal mask approach enables a single fabrication process to serve multiple device variants, maximizing equipment utilization and reducing idle capacity. The additional mask is designed to be seamlessly integrated into the standard process flow, allowing the same fabrication equipment and process parameters to produce both standard and low-leakage devices without requiring process reconfiguration or separate tooling.
Data Source
AI summary
A method for manufacturing a semiconductor product is provided. The method comprises forming a semiconductor device within a wafer utilizing a predetermined number of masks. The method further comprises forming a first low-leakage semiconductor device within the wafer utilizing a first set of additional masks. The first low-leakage semiconductor device has a lower leakage current than that of the semiconductor device.