Reusable Template for IC Sputtering Alignment
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Solution Overview
Problem
The use of stencils in sputtering processes for IC units is economically inefficient due to high manufacturing costs and difficulties in recycling, and the lack of structural support during transport without stencils leads to misalignment issues.
Innovation Solution
A reusable template with an array of recesses is used to align and support IC units on a holding ring with laser-cut apertures, eliminating the need for single-use stencils and providing structural support during sputtering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If stencils are used to support IC units during sputtering, then alignment precision is improved, but manufacturing cost increases and recyclability deteriorates
Solution Approach 1:
The patent replaces expensive, single-use stencils with a reusable template that has recesses matching the stencil aperture pattern. The template is laser-cut from a durable material and can be reused multiple times, eliminating the need to manufacture and dispose of numerous stencils while maintaining the same alignment precision function.
Solution Approach 2:
The invention transforms the disposable stencil into a recoverable and reusable template. The template remains in the sputtering chamber and is reused for subsequent batches of IC units, eliminating continuous manufacturing costs and waste associated with single-use stencils.
2Manufacturing precision
If stencils are used to support IC units during sputtering, then alignment precision is improved, but device complexity increases
Solution Approach 1:
The patent combines the stencil support function with the existing sputtering chamber structure by integrating the template directly into the chamber. This eliminates the need for separate stencil handling processes and reduces overall system complexity despite maintaining alignment precision.
Solution Approach 2:
The template serves multiple functions: it provides structural support for IC units, ensures precise alignment through its recess pattern, and acts as a reusable component for multiple sputtering cycles. This multi-functionality reduces the need for additional components and simplifies the overall process.
3Ease of manufacture
If tape is used without stencil support, then manufacturing cost decreases, but alignment precision deteriorates due to tape flexibility
Solution Approach 1:
The patent creates a rigid template that copies the aperture pattern of traditional stencils, providing the necessary structural support to prevent tape flexibility issues while maintaining the cost benefits of not using single-use stencils.
Solution Approach 2:
The invention changes the physical parameter of the support structure from flexible (tape alone) to rigid (template with recesses), thereby maintaining alignment precision while keeping the cost benefits of reusability.
4Manufacturing precision
If single-use stencils are used, then alignment precision is maintained, but productivity decreases due to continuous manufacturing and disposal
Solution Approach 1:
The patent recovers and reuses the template across multiple sputtering cycles, eliminating the continuous manufacturing and disposal cycle of single-use stencils. This increases productivity by removing repetitive setup and cleanup operations while maintaining alignment precision.
Solution Approach 2:
The reusable template enables continuous operation without interruption for stencil replacement, allowing the sputtering process to proceed efficiently across multiple batches while maintaining consistent alignment precision throughout.
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 solution reduces manufacturing costs by reusing the template and ensures precise alignment and support of IC units during the sputtering process, enhancing the efficiency and accuracy of the IC unit processing.
Implementation Method 1
Sputtering to deposit thin films of materials on IC units is an efficient method of applying materials having very high melting points.
Data Source
AI summary
A process for sputtering a plurality of integrated circuit (“IC”) units, the process having at least the steps of: applying a layer to a holding ring; cutting an array of apertures in the layer; transferring the holding ring to a template positioned within a placement station; aligning the array of apertures with an array of recesses in the template; delivering IC units to the holding ring, each IC unit corresponding to an aligned aperture and recess, and then; applying a sputtering process to the IC units engaged with the holding ring.