Oil-Resistant PCB Coating for Transmission Controllers
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Solution Overview
Problem
Electronic transmission control devices have complex constructions due to multiple electrically conductive layers and extensive lamination and etching processes, making them costly and inefficient to manufacture.
Innovation Solution
Applying a final, oil-resistant, electrically insulating layer to the outer conductive conductor paths of the printed circuit board assembly, excluding interfaces, reduces the number of conductive layers and eliminates unnecessary lamination and etching procedures, resulting in a simpler and more compact design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If multiple electrically conductive layers with lamination and etching processes are used, then electrical contact functionality is achieved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent extracts and removes the electrically conductive contact layer from the multi-layer PCB structure. Instead of using multiple conductive layers with etching, the invention uses a single outer conductive layer where contact areas are left exposed by selective removal of the insulating layer, eliminating the need for complex lamination and etching processes while maintaining electrical contact functionality.
2Reliability
If a final insulating layer is applied to outer conductive layers, then oil resistance and electrical insulation are improved, but manufacturing steps increase
Solution Approach 1:
The patent merges the insulating layer application with the PCB lamination process. The insulating layer is applied to the outer conductive layer during the lamination step, combining two manufacturing operations into one. This ensures oil resistance and electrical insulation are achieved without adding separate manufacturing steps, maintaining productivity while improving reliability.
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 approach simplifies the construction and reduces manufacturing costs by eliminating two electrically conductive layers, enabling the production of electronic transmission control devices with a more compact and cost-efficient design.
Implementation Method 1
a final, conclusive, outermost layer made of an oil resistant electrically insulating substance is applied to the outer electrically conductive conductor path layers... in order to protect the same from corrosion caused by oil
Implementation Method 2
The printed circuit board assembly has numerous conductive conductor path layers, which are electrically insulated against one another by dielectric layers
Data Source
AI summary
The present disclosure relates to an electronic transmission controller, with a housing, a printed circuit board assembly, and at least one electronic module mounted on the printed circuit board assembly. The printed circuit board assembly may include a first region extending inside the housing, the first region being sealed from an external fluid. The printed circuit board assembly may include a second region extending outside the housing. The printed circuit board assembly may include a plurality of electrically conductive conductor path layers which are electrically insulated against one another by dielectric layers. An outer layer made of a fluid resistant and electrically insulating material may be applied to at least one outer electrically conductive conductor path layer of the plurality of conductive path layers at a location of the second region of the printed circuit board assembly.