Metallized Tie Layer Bonding for Compact Ceramic-Polymer Assemblies
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Achieving strong and reliable bonding between polymeric, ceramic, or ceramic-polymer composite components and other components is challenging, especially in small assemblies where overmolding increases volume and adhesion is limited, leading to reduced assembly strength.
Innovation Solution
Creating metallized 'tie' layers on the components using techniques like sputtering with materials like chromium and copper, followed by metal-to-metal bonding methods such as soldering, brazing, or adhesive bonding, which provides a strong and alternative surface for bonding, eliminating the need for an overmold layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If overmolding is used to create structural attachment between polymeric/ceramic components and underlying components, then assembly strength is improved, but assembly volume increases and manufacturing complexity increases
Solution Approach 1:
The invention extracts and eliminates the overmold layer from the assembly structure. Instead of using overmolding to create structural attachment, the patent applies metallized tie layers directly to the component surfaces that require bonding, thereby achieving strong attachment without adding the extra volume that an overmold would require.
Solution Approach 2:
The invention introduces metallized tie layers as intermediary surfaces between polymeric/ceramic components and underlying components. These metallized layers serve as mediator surfaces that enable strong metal-to-metal bonding, replacing the need for overmolding while maintaining or improving bond strength.
2Strength
If overmolding is used to create structural attachment, then assembly strength is improved, but device complexity increases
Solution Approach 1:
The invention removes the overmold process from the manufacturing sequence. By applying metallized tie layers directly to component surfaces before assembly, the complex multi-step overmolding process is replaced with simpler surface treatment and bonding operations.
Solution Approach 2:
The metallized tie layers are applied in advance to the component surfaces before the bonding operation. This preliminary action prepares the surfaces for direct metal-to-metal bonding, eliminating the need for subsequent overmolding operations and simplifying the overall manufacturing process.
3Volume of moving object
If direct bonding is used between polymeric/ceramic surfaces and underlying components, then assembly volume is reduced, but adhesion is limited and bond strength is reduced
Solution Approach 1:
The invention applies metallized tie layers locally to the specific surfaces that require bonding, rather than modifying the entire component. This localized metallization creates high-adhesion bonding surfaces exactly where needed, enabling strong bonds without adding volume to the overall assembly.
Solution Approach 2:
The invention creates composite surfaces by combining metallized layers with polymeric or ceramic substrates. The metallized tie layers provide the bonding interface with high adhesion, while the underlying polymeric or ceramic material maintains the original component properties, achieving both strong bonding and compact assembly volume.
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 method enhances adhesion and structural integrity by allowing metal-to-metal bonding, improving the strength of assemblies and enabling their use in harsh environments like medical applications without the need for additional adhesives or higher temperatures.
Implementation Method 1
techniques like sputtering with materials like chromium and copper
Data Source
Figure 1A
Figure 1B
AI summary
A method of manufacture includes forming a metallized tie layer on a surface of a nonmetallic component, positioning the surface of the non-metallic component to mate with a metallic surface of a second component, and joining the metallized tie layer with the mated metallic surface of the second component using metal to metal joining techniques.