Substrate-Bonded Variable Capacitor Testing by Forward Bias Emission
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Solution Overview
Problem
Existing electronic devices with variable capacitors bonded on a substrate face high test difficulty, as existing methods cannot accurately locate and repair failed components during the manufacturing process.
Innovation Solution
A manufacturing method that applies a forward bias to electronic components to determine if they are normal or failed, using light emission or thermal characteristics to identify faulty components, allowing for real-time repair and improving manufacturing yield.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If reverse bias test is applied to variable capacitors after bonding, then the test can determine whether capacitors are normal or failed, but the test difficulty is high and single failed components cannot be located
Solution Approach 1:
The patent inverts the testing approach by applying forward bias instead of reverse bias to the variable capacitors. This inversion enables the capacitors to emit light when functioning normally, transforming an invisible electrical test into a visible optical detection process. The light emission property allows for easy identification of functional components versus failed ones, dramatically reducing test difficulty while maintaining reliability verification.
2Reliability
If product function test is performed after bonding multiple variable capacitors to substrate, then overall device functionality can be assessed, but accurate location of single failed component is impossible
Solution Approach 1:
The patent applies segmentation by enabling individual testing of each variable capacitor through light emission detection. Instead of testing the entire device as a single unit, each capacitor can be independently verified by observing its light emission when forward bias is applied. This segmentation allows precise identification of which specific component has failed, rather than only knowing that the overall device is defective.
3Productivity
If existing test methods are used for variable capacitors bonded on substrate, then manufacturing process can continue, but repair of failed components during manufacturing is not enabled
Solution Approach 1:
The patent implements preliminary action by performing component-level testing and identification of failed capacitors during the manufacturing process itself, before final device assembly and delivery. By using forward bias to induce light emission and detecting which specific components fail, the system enables repair or replacement actions to be taken immediately during manufacturing, rather than discovering failures only after the product reaches the customer.
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
Enables accurate and convenient detection of failed components during manufacturing, facilitating timely repair and enhancing the production efficiency of electronic devices.
Implementation Method 1
apply a forward bias to the electronic component and detect whether the electronic component emits light
Data Source
AI summary
A manufacturing method of an electronic device is provided. The manufacturing method of the electronic device includes following steps: providing a substrate; bonding at least one electronic component to the substrate, wherein the at least one electronic component is mainly driven by a reverse bias in an operating mode; applying a forward bias to the at least one electronic component, and determining whether the at least one electronic component is normal or failed; and transporting the substrate configured with the at least one electronic component determined to be normal to a next production site or repairing the at least one electronic component determined to be failed.