Staggered Electrical Connector Terminals for Dense Chip Module Assembly
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Solution Overview
Problem
Existing electrical connectors for chip modules face challenges in achieving a dense arrangement of conductive terminals while maintaining sufficient normal force and preventing damage during assembly, as the elastic arms can collide or scratch when inserted incorrectly.
Innovation Solution
An electrical connector design with staggered receiving holes and conductive terminals, where the elastic arms of the back row do not exceed the front row before assembly, allowing for flexible insertion directions and increasing normal force by extending beyond the front row upon module pressure, enabling a denser terminal arrangement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If sufficient distance is kept between receiving holes of adjacent rows, then the electrical connector can provide sufficient normal force and allow enough space for elastic arm deformation, but the arrangement of conductive terminals cannot be dense
Solution Approach 1:
The patent applies staggered arrangement of receiving holes in different rows, where the receiving holes of the second row are positioned between the receiving holes of the first row in the longitudinal direction. This spatial reconfiguration allows elastic arms to extend beyond the line of the front row while maintaining adequate deformation space, thereby enabling denser terminal arrangement without compromising normal force capability.
2Force
If elastic arms are arranged to exceed the line of the front row, then the electrical connector can provide sufficient normal force and enable dense terminal arrangement, but the conductive terminals may collide or scratch with adjacent row strips during insertion
Solution Approach 1:
The patent designs the elastic arms with predetermined bending directions that guide their insertion path. The first elastic arm bends towards the first conductive terminal, while the second elastic arm bends towards the second conductive terminal, ensuring that during insertion the elastic arms follow safe trajectories and do not collide with or scratch adjacent strips, thus preventing damage before assembly is complete.
3Ease of manufacture
If elastic arms are constrained not to exceed the line of the front row, then assembly is simpler and terminal damage is prevented, but the electrical connector cannot provide sufficient normal force and terminal density is reduced
Solution Approach 1:
The staggered arrangement of receiving holes in the longitudinal direction creates additional spatial dimension for elastic arm deployment. This allows the elastic arms to extend beyond the front row line in the longitudinal direction while maintaining proper alignment and avoiding interference, thereby achieving both enhanced normal force capability and terminal density without compromising assembly simplicity.
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
Facilitates convenient assembly by allowing insertion from different directions, enhances normal force through extended arm length, and allows for a closer spacing of terminals, preventing short circuits and improving the overall structural elasticity.
Implementation Method 1
an elastic arm is bent and extends upwards from the base
Data Source
AI summary
An electrical connector for electrically connecting a chip module includes: an insulating body, located below the chip module and opened with at least two rows of receiving holes arranged front and back in a staggered manner; a plurality of solder balls, accommodated in the insulating body; a plurality of conductive terminals, each having a base fixed in the receiving hole, in which an elastic arm is bent and extends upwards from the base, and the elastic arm has a contact portion for conducting the chip module upwards. The bases of the same row are arranged in the same line, the contact portions of the back row do not exceed the line of the front row before the chip module presses the contact portions downwards, and the contact portions of back row exceed the line of the front row after the chip module presses the contact portions downwards.