CN-224233892-U - Expansion and contraction amount detection structure of pressed circuit board

Abstract

The present disclosure provides a structure for detecting the amount of expansion and contraction of a laminated circuit board. The expansion and contraction amount detection structure of the laminated circuit board comprises a circuit board body, wherein a first detection through hole, a second detection through hole and a third detection through hole are formed in the circuit board body, the first detection through hole and the second detection through hole are arranged in the same row at intervals, the first detection through hole and the third detection through hole are arranged in the same column at intervals, so that the first detection through hole, the second detection through hole and the third detection through hole are arranged in a right-angle three-point mode, the actual distance between the center of the first detection through hole and the center of the second detection through hole is a first detection object distance, the first detection object distance is used for calculating with a first target distance, the actual distance between the center of the first detection through hole and the center of the third detection through hole is a second detection object distance, and the second detection object distance is used for calculating with a second target distance. The expansion and contraction amount detection structure of the pressed circuit board enables the use failure rate of the pressed circuit board to be low.

Inventors

• CHEN FEI
• CHEN WENLI

Assignees

• 惠州市煜翔科技有限公司

Dates

Publication Date

20260512

Application Date

20250410

Claims (10)

1. 1. The utility model provides a compression circuit board's expansion and contraction volume detection structure, includes the circuit board body, its characterized in that, circuit board body has seted up first detection through-hole, second detection through-hole and third detection through-hole, first detection through-hole with the interval sets up with the second detection through-hole in same row, first detection through-hole with the interval sets up with the third detection through-hole in same row, so that first detection through-hole, second detection through-hole and third detection through-hole are right angle three point-like arrangement; the actual distance between the center of the first detection through hole and the center of the second detection through hole is a first detection object distance, the first detection object distance is used for calculating a first target distance, the actual distance between the center of the first detection through hole and the center of the third detection through hole is a second detection object distance, and the second detection object distance is used for calculating a second target distance.
2. 2. The structure for detecting the amount of shrinkage and expansion of the laminated circuit board according to claim 1, wherein the circuit board body is provided with a copper foil layer.
3. 3. The structure for detecting the amount of swelling and shrinking of the laminated circuit board according to claim 1, wherein the second detecting through hole and the third detecting through hole are diagonally arranged.
4. 4. The structure of claim 1, wherein the circuit board body comprises a plurality of substrates, the plurality of substrates are stacked, each of the substrates is provided with a first via hole, a second via hole and a third via hole, the plurality of first via holes between the plurality of substrates are mutually communicated to form the first detection through hole together, the plurality of second via holes between the plurality of substrates are mutually communicated to form the second detection through hole together, and the plurality of third via holes between the plurality of substrates are mutually communicated to form the third detection through hole together.
5. 5. The structure for detecting the amount of swelling and shrinking of the laminated circuit board according to claim 4, wherein an adhesive layer is provided between two adjacent substrates.
6. 6. The structure for detecting the amount of shrinkage and expansion of the laminated circuit board according to claim 5, wherein the adhesive layer is a prepreg layer structure.
7. 7. The structure for detecting the amount of swelling and shrinking of the laminated circuit board according to claim 5, wherein the number of the substrates is m, the number of the adhesive layers is m-1, and m is an integer greater than or equal to 3.
8. 8. The structure for detecting the amount of expansion and contraction of the laminated circuit board according to claim 1, wherein the cross section of the first detecting through hole is in a circular shape or a rectangular shape or a triangular shape or a trapezoid shape.
9. 9. The structure for detecting the amount of expansion and contraction of the laminated circuit board according to claim 1, wherein the cross section of the second detecting through hole is in a circular shape or a rectangular shape or a triangular shape or a trapezoid shape.
10. 10. The structure for detecting the amount of expansion and contraction of the laminated circuit board according to claim 1, wherein the cross section of the third detecting through hole is in a circular shape or a rectangular shape or a triangular shape or a trapezoid shape.

Description

Expansion and contraction amount detection structure of pressed circuit board Technical Field The disclosure relates to the technical field of circuit board detection, and in particular relates to a shrinkage and expansion amount detection structure of a laminated circuit board. Background The laminated circuit board is an electronic component obtained by laminating a plurality of layers of substrates and capable of providing electrical connection between electronic components. The pressfitting circuit board carries out pressfitting processing under high temperature high pressure's environment for the pressfitting circuit board is relatively easy to appear the expend with heat and contract cold phenomenon, in order to make the pressfitting circuit board have certain expansion and contraction volume, in order to ensure that the expansion and contraction volume of pressfitting circuit board accords with the requirement, the staff need detect the expansion and contraction volume of pressfitting circuit board, in order to make be provided with the expansion and contraction volume detection structure on the pressfitting circuit board and supply the staff to detect. The expansion and contraction amount detection structure of the laminated circuit board in the related art comprises a circuit board body, wherein the circuit board body is formed by laminating a plurality of layers of substrates, a plurality of target through holes are formed in the circuit board body, the target through holes are arranged along the periphery of the circuit board body at intervals, each three target through holes form a target group, and one side of the circuit board body is provided with at least one target group, such as Chinese patent No. CN 207423129U. However, because the circuit board body has seted up a plurality of target through-holes, every target through-hole is the via structure, and every three target through-hole forms into a target group, there is a target group on one side of circuit board body at least for target through-hole quantity on the circuit board body is more, and the interval between two adjacent target through-holes is less, so that the via structure on the circuit board body is more and denser, the via structure is the weaker link on the circuit board body, more and denser via structure leads to the use reliability of circuit board body to reduce, thereby make the service failure rate of pressfitting circuit board higher. Disclosure of utility model The purpose of this disclosure is to overcome the shortcoming among the prior art, provides a detection structure that makes the operation fault rate of pressfitting circuit board lower pressfitting circuit board's the volume that contracts. The aim of the disclosure is achieved by the following technical scheme: The utility model provides a compression circuit board's expansion and contraction volume detection structure, includes the circuit board body, circuit board body has seted up first detection through-hole, second detection through-hole and third detection through-hole, first detection through-hole with the interval setting of second detection through-hole same row, first detection through-hole with the interval setting of third detection through-hole same row, so that first detection through-hole, second detection through-hole and third detection through-hole are right angle three point-like arrangement; the actual distance between the center of the first detection through hole and the center of the second detection through hole is a first detection object distance, the first detection object distance is used for calculating a first target distance, the actual distance between the center of the first detection through hole and the center of the third detection through hole is a second detection object distance, and the second detection object distance is used for calculating a second target distance. In one embodiment, the circuit board body is provided with a copper foil layer. In one embodiment, the second detection through hole is diagonally arranged with respect to the third detection through hole. In one embodiment, the circuit board body includes a plurality of substrates, a plurality of substrates are stacked, each substrate is provided with a first via hole, a second via hole and a third via hole, the plurality of first via holes between the substrates are mutually communicated to form the first detection through hole together, the plurality of second via holes between the substrates are mutually communicated to form the second detection through hole together, and the plurality of third via holes between the substrates are mutually communicated to form the third detection through hole together. In one embodiment, an adhesive layer is disposed between two adjacent substrates. In one embodiment, the adhesive layer is a prepreg layer structure. In one embodiment, the number of the substrates is m, the number of the bonding layers is m-1, and m is