Extra Tracks Barrier for Printed Circuit Sheet Bonding
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Solution Overview
Problem
The existing bonding method for print head assemblies results in defects due to adhesive leakage during the compression process, compromising the protection of electronic circuitry in connection strips used in ink jet printers.
Innovation Solution
The method involves forming extra tracks on the printed circuit sheets that align and engage with each other to create a barrier, preventing adhesive leakage and ensuring proper processing without defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If adhesive is applied to bond printed circuit sheets together, then electrical connections are established, but adhesive leakage occurs during compression which compromises protection of electronic circuitry
Solution Approach 1:
Extra tracks are introduced as intermediary structures between the adhesive and the external environment. These tracks act as a mediator that absorbs and contains the adhesive, preventing it from leaking outward while still allowing the adhesive to perform its bonding function between the printed circuit sheets.
Solution Approach 2:
The extra tracks are formed in advance before the bonding process to create a preventive barrier. This preliminary structure is designed to counteract the potential harmful effect of adhesive leakage by establishing a containment boundary before the compression step occurs.
2Ease of manufacture
If conventional bonding method is used, then sheets are bonded together, but adhesive is squeezed out and contaminates processing sites
Solution Approach 1:
The extra tracks serve as an intermediary containment structure that intercepts the adhesive before it can reach the external processing sites. This allows the simple bonding process to continue without requiring complex additional containment measures.
Solution Approach 2:
The adhesive that would otherwise be considered a contaminant is redirected to serve a useful function by being contained within the extra tracks. The potential harm of adhesive squeezing out is converted into a beneficial containment mechanism that protects the processing areas.
3Object-affected harmful factors
If extra tracks are formed to prevent adhesive leakage, then adhesive flow is blocked, but device complexity increases
Solution Approach 1:
The extra tracks are implemented only in specific local areas where adhesive leakage is most likely to occur, rather than modifying the entire printed circuit sheet structure. This localized approach provides effective leakage prevention while minimizing the overall complexity increase.
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 solution effectively prevents adhesive leakage, ensuring reliable electrical connections and protecting the electronic circuitry by maintaining the integrity of the connection strips during further processing steps.
Implementation Method 1
bonding being carried out by applying an adhesive to one of the sheets
Implementation Method 2
compressing the sandwich formed by the sheets and the adhesive
Data Source
AI summary
A method of bonding printed circuit sheets to one another, each of the printed circuit sheets having a pattern of electrically conductive tracks, and the bonding being carried out by applying an adhesive to one of the sheets in a connection zone where the tracks on the one sheet are to be connected to corresponding tracks on the other sheet, superposing the sheets in the connection zone such that the adhesive is sandwiched between the sheets, and aligning the sheets such that corresponding tracks on the two sheets are aligned with one another. The method includes a preparatory step of forming extra tracks on the two sheets such that, in the alignment and compression steps, the extra tracks are brought into engagement with one another and constitute a barrier for the adhesive.