Black hole quality testing board for PCB, and quick examination method

A test board and black hole technology, which is applied in electronic circuit testing, printed circuit testing, circuit inspection/identification, etc., can solve the problems of black hole quality prevention and control, and achieve the effect of preventing poor quality

Inactive Publication Date: 2017-11-17
VICTORY GIANT TECH HUIZHOU CO LTD
View PDF10 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the black hole process needs to be copper-plated before using the method of backlight sectioning to detect wheth...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Black hole quality testing board for PCB, and quick examination method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0015] In order to facilitate those skilled in the art to understand the technical content of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0016] Such as figure 1 The PCB black hole quality test board shown includes a 60*60mm square copper-clad double-sided board 1, and a test group 2 is provided at the four corners of the copper-clad double-sided board 1. The test group includes two test pads, and the test pads are It is circular and has a diameter of 1mm, and the distance between the centers of the two test pads is 5mm; there are 6 through-hole groups 3 in the middle of the copper-clad double-sided board 1, and each through-hole group 3 includes 7 through-holes, with a diameter of 0.2 mm, 0.25mm, 0.3mm, 0.35mm, 0.4mm, 0.45mm, 0.5mm, lined up in order of diameter, and the center distance between adjacent through holes is 5mm. The upper and lower sides of the copper-clad...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Sizeaaaaaaaaaa
Center distanceaaaaaaaaaa
Diameteraaaaaaaaaa
Login to view more

Abstract

Four corners and the central part of a copper-coated double-side plate are provided with the dedicated testing groups and through hole groups, so as to prepare a PCB black hole quality testing board. The method comprises the steps: carrying out the black hole direct electroplating of the PCB black hole quality testing board, detecting a resistance value R1 between two testing bonding pads in each testing group and a resistance value R3 between circuit bonding pads at two ends of he through holes, and comparing the resistance values R1 and R3 with a preset surface black hole film resistance standard value R2 and a preset in-hole black hole film resistance standard value R4, thereby achieving the purpose of quick examination. Before the black hole direct electroplating of a PCB product, the PCB black hole quality testing board can be used for testing and inspection, so as to pre-judge the machining quality of the black-hole direct electroplated surface black hole film and in-hole black hole, provide reference for the early finding of technological defects and the adjustment of the technological parameters, and prevent poor quality from causing waste during the black-hole direct electroplating of the PCB product.

Description

technical field [0001] The invention relates to a direct electroplating technology for black holes on a PCB board, in particular to a PCB black hole quality test board and a rapid inspection method. Background technique [0002] Black hole direct electroplating technology is a new technology to replace electroless copper plating. It uses a black solution composed of fine carbon black or graphite with strong conductivity, collectively referred to as black hole liquid, and the English name is Blackhole. It is characterized in that it simplifies the process of metallizing holes, saves working hours, reduces material consumption, effectively controls the discharge of waste water, and reduces the production cost of printed boards. The black hole liquid has good stability, and no hydrogen gas is released during the adsorption process of the through-hole copper clad laminate. However, the black hole process requires copper plating before using the backlight section method to dete...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H05K1/02H05K3/42G01R31/28
CPCG01R31/2801H05K1/0268H05K3/424H05K2203/16
Inventor 张亚锋何艳球邓细辉施世坤
Owner VICTORY GIANT TECH HUIZHOU CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap