Sensor Chip ESD Protection via Segmented Carrier Element
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Solution Overview
Problem
Existing sensor devices lack effective electrostatic discharge protection, which can damage semiconductor chips integrated with sensing elements, and existing solutions often require modifying the sensor device design.
Innovation Solution
An electrostatic discharge protection element, typically a metallic structure with a bridging or rod shape, is placed on a carrier separate from the sensor device, connected to ground for discharge drainage, and designed to trap electrical discharges without encasing the sensor device, ensuring effective protection without impairing the sensing function.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electrostatic discharge protection is added to sensor devices, then reliability against electrical damage is improved, but device complexity increases
Solution Approach 1:
The protection system is segmented into two independent parts: the sensor device itself and the separate protection element. The protection element is a standalone component that can be added without modifying the sensor device design, thus improving reliability while minimizing impact on device complexity.
Solution Approach 2:
A separate protection element acts as an intermediary between the sensor device and the electrostatic discharge threat. This protection element intercepts and diverts electrical discharges away from the sensor chip, providing protection without requiring internal modifications to the sensor device.
2Reliability
If protection element is placed close to sensor device for effective protection, then protection effectiveness is improved, but risk of flash-arcs increases
Solution Approach 1:
The protection element is positioned in the vertical dimension (height) rather than horizontally adjacent to the sensor device. By extending upward and trapping discharges in the vertical space above the sensor device, the solution achieves effective protection while maintaining horizontal separation distance to prevent flash-arcs.
3Reliability
If protection element traps electrical discharges, then electrostatic discharge protection is improved, but electrical isolation from sensor chip must be maintained
Solution Approach 1:
The protection function is extracted from the sensor device and implemented as a separate protection element. This element is electrically connected to ground through the carrier but is physically separated from the sensor chip, allowing it to trap and divert discharges while maintaining electrical isolation from the sensitive sensing components.
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
The solution provides robust electrostatic discharge protection for sensor chips without altering the sensor device design, ensuring the sensor's functionality and mechanical stability while preventing damage from electrical discharges.
Implementation Method 1
an electric discharge protection element - in short: protection element - is arranged on the carrier. This protection element provides for an effective protection of the sensor chip from such electric discharge
Data Source
Figure 1a~1d
Figure 2a~2b
Figure 3~5
AI summary
An electronic component comprises a carrier (3), a sensor device (2) mounted on the carrier (3), which sensor device (2) comprises a sensor chip (21), and an electrostatic discharge protection element (1) for protecting the sensor chip (21) from an electrostatic discharge, which protection element (1) is mounted on the carrier ( 3).