Printed circuit boards and memory modules
US11974391B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 11, 2022 |
| Grant date | Apr 30, 2024 |
| Priority date | — |
| Expiry date | Jul 27, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K2201/10159
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A PCB includes a plurality of layers spaced apart in a vertical direction, a first detection pattern and a second detection pattern and pads connected to the first detection pattern and the second detection pattern. The first detection pattern and the second detection pattern are provided in a respective one of a first layer and a second layer adjacent to each other such that the first detection pattern and the second detection pattern are opposed to each other. The pads are provided in an outmost layer. Each of the first detection pattern and the second detection includes at least one main segment extending in at least one of first and second horizontal directions and a diagonal direction. A time domain reflectometry connected to a pair of pads detects a misalignment of the PCB by measuring differential characteristic impedance of the first detection pattern and the second detection pattern.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.