Optoelectronic Component Surface Doping for ESD Protection
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Solution Overview
Problem
Optoelectronic components are prone to short circuits and electrostatic discharges due to their sensitivity, and existing production methods are not efficient in providing effective protection against these issues.
Innovation Solution
An optoelectronic component with a semiconductor body connected to a carrier substrate via a solder layer, featuring a surface doping zone with a pn junction that acts as a protective diode, reducing the risk of short circuits and electrostatic discharges by routing electrical connections through vias from one main surface to the other, allowing for easy production and surface mounting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the optoelectronic component uses conventional connection methods without surface doping, then the production process is simpler, but the component is highly sensitive to short circuits and electrostatic discharges
Solution Approach 1:
A surface doping zone is created on the carrier substrate before the optoelectronic component is mounted. This preliminary doping establishes a protective diode structure that will protect against future electrostatic discharges and short circuits, addressing the reliability issue before the component is assembled and put into service.
Solution Approach 2:
The surface doping zone acts as an intermediary protective layer between the carrier substrate and potential electrostatic discharges or short circuits. This doped region serves as a mediator that safely dissipates electrical surges, protecting the mounted optoelectronic component without requiring complex additional protection structures.
2Ease of manufacture
If vias are routed from the first main surface to the second main surface for electrical connections, then the component can be surface-mounted with easy integration, but the risk of short circuits increases
Solution Approach 1:
The surface doping zone converts the potentially harmful effect of electrostatic discharges and short circuits into a beneficial protective mechanism. When voltage surges occur through the vias, the doping zone creates a diode that safely channels and dissipates the electrical energy, transforming what would be damaging events into controlled protective actions.
Solution Approach 2:
The surface doping zone provides beforehand cushioning by creating a protective diode structure that is ready in advance to absorb and dissipate electrical surges. This pre-established protection cushioning allows the vias to be routed for surface mounting while having the safety mechanism already in place to mitigate short circuit risks when they occur.
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 component is less sensitive to short circuits and electrostatic discharges, with a protective diode effectively discharging voltage pulses and maintaining high current-carrying capacity while being easy to produce and integrate with printed circuit boards.
Implementation Method 1
The surface doping zone has a p-conducting region that contains a p-type dopant. Furthermore, the surface doping zone has an n-conducting region adjoining the p-conducting region, so that a pn junction is formed between the p-conducting region and the n-conducting region.
Implementation Method 2
The protective diode formed in the surface doping zone protects the semiconductor body from electrostatic discharges. Voltage pulses in the blocking direction of the semiconductor body triggered by electrostatic discharges are discharged by a current flow through the pn junction in the surface doping zone of the carrier substrate.
Data Source
Figure 1
Figure 2~3
AI summary
The invention relates to an optoelectronic component, having a semiconductor body (1) comprising an epitaxial layer sequence (2), and a carrier substrate (6) made of a semiconductor material and connected to the semiconductor body (1) by means of a solder layer (7) and further comprising interlayer connections (9a, 9b). The carrier substrate (6) comprises a surface doping zone (14) extending along a first main surface (11) facing the semiconductor body (1). The surface doping zone (14) comprises a p-conductive region (14a) and an n-conducting region (14b) adjacent thereto, between which a pn-transition (16) is formed. The n-conductive region (14b) is electrically connected to a p-doped region (3) of the epitaxial layer sequence (2) by means of a first sub-region (7a) of the solder layer (7), and the p-conductive region (14a) is electrically connected to an n-doped region (5) of the epitaxial layer sequence (2) by means of a second sub-region (7b) of the solder layer (7), so that the pn-transition (16) forms a protective diode for the semiconductor body (1) in the surface doping zone (14).