Patents
Literature
Patsnap Copilot is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
Patsnap Copilot

2115results about "Printed circuit testing" patented technology

Method for detecting power plane-to-power plane shorts and I/O net-to power plane shorts in modules and printed circuit boards

A method of locating in a non-destructive and non-invasive manner power plane-to-power plane shorts or I/O net-to-power plane shorts found in a printed circuit board or a multi-chip-module by way of a magnetic field generating probe is described. Thousands of nets can be simultaneously tested to detect not only the presence of a short but also to accurately pinpoint its position. For high resistance shorts, the probe is provided with a pot core housed inductor located at its tip, and is used at low frequencies to minimize the effect of the capacitive impedance between the power planes. For low resistance shorts, the probe is used at high frequencies, delivering equal but opposite current to each of two matched inductors at the tip of the probe to maximize mutual inductive coupling while minimizing electrostatic capacitive coupling with the board or module. In both cases, the highest current stress is on the probe rather than on the expensive and fragile package under inspection. This allows the test to be both more sensitive to high resistance shorts at low frequencies and is less destructive, thereby being less likely to blow filamentary shorts due to high current stresses through the board or module.
Owner:IBM CORP

Flexible circuit board manufacturing process automatic monitoring and intelligent analysis system and method

The invention provides a flexible circuit board manufacturing process automatic monitoring and intelligent analysis system and method. The flexible circuit board manufacturing process automatic monitoring and intelligent analysis system includes a basic information module, a parameter acquisition module, a comprehensive database module, an intelligent data analysis module and a monitoring display and data report module; the parameter acquisition module includes a microscope automatic data acquisition device and a copper thickness testing device; the microscope automatic data acquisition device acquires line width and line distance of an etching processing procedure and aperture of a drilling processing procedure, the copper thickness testing device is adopted to measure copper thickness, and to procedure defect data are put into statistics; and a multivariate statistical process control method, a neural network and a support vector machine are adopted as basic analysis methods so as to perform intelligent analysis on acquired data, and predict processing procedures and production line abnormalities, and identify generated abnormality sources. With the flexible circuit board manufacturing process automatic monitoring and intelligent analysis system and method of the invention adopted, automatic monitoring on the manufacturing process and the quality of a flexible circuit board can be realized, and the stability of the procedures and the yield of products can be improved.
Owner:SOUTH CHINA UNIV OF TECH

Array substrate, display panel, and testing method of display panel

The invention discloses an array substrate, a display panel, and the testing method of the display panel. The array substrate comprises a plurality of display signal lines, which are disposed on the display area; a plurality of first bonding pads and a plurality of second bonding pads, which are disposed on a peripheral area around the display area, and are correspondingly connected with the plurality of display signal lines; a first testing area and a second testing area, which are disposed on two sides of a main body area along a first direction. The first bonding pads comprise first main body parts, and the second bonding pads comprise second main body parts. The first main body parts and the second main body parts are disposed on the main body area, and are arranged at intervals along a second direction. At least a part of the first bonding pads comprise first testing parts, and at least a part of the second bonding pads comprise second testing parts. The first testing parts are disposed on the first testing area, and the second testing parts are disposed on the second testing area. By adopting the technical scheme provided by the invention, a VT detection circuit is saved, and the lower narrow edge frame space of the display panel is saved.
Owner:XIAMEN TIANMA MICRO ELECTRONICS

Printed circuit board maintenance method an system

The invention provides a printed circuit board maintenance method and system, wherein the maintenance method includes the steps of inputting a standard pattern and parameters of a printed circuit board to an automatic optical detection scanning host; obtaining a scanning pattern of a printed circuit board to be maintained through the host; comparing the scanning pattern with the standard pattern and parameters to find out difference points and recording coordinates; performing amplification displaying on the difference point through maintenance station rechecking equipment to judge whether the printed circuit board to be maintained is qualified; if yes, transporting the printed circuit board to a board collecting area; if no, repairing the printed circuit board; then performing rechecking through the rechecking equipment to judge whether the printed circuit board is qualified; if yes, transporting the printed circuit board to the board collecting area, and ending maintenance; if no, repairing the printed circuit board again; and repeating rechecking and maintenance till the printed circuit board is qualified. The method and system realize detection and repair of the printed circuit board, saves manpower and reworking material cost, improves efficiency, improves product quality, and avoids problems of missing detection and reliability caused by manual checking and repair.
Owner:王俊 +1
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