Disk Drive Flexure Interleave Circuit Jumper Conductor
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Solution Overview
Problem
Conventional interleave circuits in disk drive flexures face challenges in simplifying the structure of conductor branch portions and arranging them within a narrow area due to increased complexity from numerous connecting terminals.
Innovation Solution
The interleave circuit design incorporates a jumper conductor with a branch-side metal portion, a pad-side metal portion, and a bridge portion, which are formed independently on the metal base and insulating layer, allowing for a compact and simplified conductor branch structure by using penetrating connecting members to connect the branch conductors to electrode pads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the number of branch conductors is increased to achieve lower impedance and lower attenuation, then the impedance and attenuation are improved, but the number of connecting terminals and the interconnect structure become more complicated
Solution Approach 1:
The patent merges multiple connecting terminals and conductive members into a single integrated jumper conductor structure. The jumper conductor includes a branch-side metal portion that connects to multiple branch conductors, a pad-side metal portion that connects to the electrode pad, and a bridge portion that spans between them, eliminating the need for multiple separate connecting terminals and conductive members.
Solution Approach 2:
The jumper conductor serves multiple functions simultaneously: it acts as a structural support element, an electrical conductor connecting multiple branch conductors to the electrode pad, and a mechanical anchor for the insulating layer. This multi-functional design reduces the overall number of components needed in the interleave circuit.
2Adaptability or versatility
If the number of connecting terminals is increased to connect more branch conductors, then the electrical connection capability is improved, but the arrangement within the limited narrow area becomes difficult
Solution Approach 1:
The patent transitions from a planar arrangement of multiple separate connecting terminals to a three-dimensional integrated structure. The jumper conductor extends vertically through the insulating layer with penetrating connecting members, utilizing the thickness dimension to accommodate multiple connections without increasing the footprint area.
Solution Approach 2:
The insulating layer is nested within the jumper conductor structure, with the jumper conductor extending through the thickness of the insulating layer. The penetrating connecting members are embedded within the insulating layer, creating a nested configuration that maximizes space utilization within the narrow area.
Data Source
AI summary
An interleave circuit includes a metal base, an insulating layer, a first conductor member having first branch conductors, a second conductor member having second branch conductors, and a jumper conductor, which is a part of the metal base. The jumper conductor includes a branch-side metal portion, a pad-side metal portion, and a bridge portion. The bridge portion is formed between the branch-side metal portion and the pad-side metal portion. The branch-side metal portion electrically conducts to connecting terminals of the first branch conductors via branch-side connecting members. The pad-side metal portion electrically conducts to an electrode pad via a pad-side connecting member. The bridge portion includes a crossover portion which crosses over a third conductor member.