Semiconductor Housing Bond Wire Corrosion Protection
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Solution Overview
Problem
Semiconductor components, especially those in automotive applications, face corrosion issues due to exposure to aggressive media like corrosive substances and moisture, which can affect interconnects within their housings.
Innovation Solution
A method involving a semiconductor component with a housing containing a semiconductor chip connected via bond wires, where a protective material is applied to the electrical contacts and adjacent bond wire regions, and a gel is filled in a partial cavity area to enhance robustness against aggressive media, combined with a protective material applied on the electrical contacts and bond wires to reduce corrosion susceptibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If semiconductor components are exposed to aggressive media for functional operation, then the components can perform their intended function (e.g., pressure measurement), but the interconnects and electrical contacts become susceptible to corrosion
Solution Approach 1:
A protective coating is applied to the bond wire and electrical contacts, forming a thin film barrier that prevents corrosive substances from reaching the metal surfaces. The coating material is selected to be chemically resistant to aggressive media while maintaining electrical conductivity where needed, thus protecting the interconnects during functional operation in harsh environments.
Solution Approach 2:
An intermediary protective layer is introduced between the electrical contacts/interconnects and the aggressive media. This protective coating acts as a mediator that allows the component to function in harsh environments while isolating the metal surfaces from direct contact with corrosive substances, thereby preventing corrosion.
2Object-affected harmful factors
If protective measures are applied to electrical contacts and bond wires, then corrosion protection is improved, but the device structure and manufacturing process become more complex
Solution Approach 1:
Protective coating is applied selectively only to the bond wire and electrical contacts that are exposed to aggressive media, rather than coating the entire component. This localized approach provides necessary corrosion protection to critical areas while avoiding unnecessary complexity and material usage in protected areas, thus balancing protection with structural simplicity.
Solution Approach 2:
Instead of providing complete encapsulation or full coating of all components, the protective measure is applied partially only to the extent necessary - specifically on the bond wire and electrical contacts that are most susceptible to corrosion. This partial action achieves adequate protection without the excessive complexity of complete sealing structures.
Data Source
AI summary
A method for producing a semiconductor component is proposed. The method includes providing a housing. At least one semiconductor chip is arranged in a cavity of the housing. Furthermore, an electrical contact of the semiconductor chip is connected to an electrical contact of the housing via a bond wire. The method furthermore includes applying a protective material on the electrical contact of the housing and also on a region of the bond wire which is adjacent to the electrical contact of the housing. Moreover, the method also includes filling at least one partial region of the cavity with a gel.