Multi-layer backpanel including metal plate ground and voltage planes
US4054939A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 6, 1975 |
| Grant date | Oct 18, 1977 |
| Priority date | — |
| Expiry date | Jun 6, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K2201/1059
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A metal voltage plate is drilled or punched first with alignment holes, placed upon a jig and drilled with contact clearance holes in preselected locations. A metal ground plate is also drilled or punched first with alignment holes, placed upon a jig and drilled with contact clearance holes in preselected locations. The clearance holes are preferably in the range of 80-90 mils in diameter and located in positions where contacts are to pass through a plate without making electrical connection therewith. Next, both the voltage and ground plates are coated, including the inner walls of the clearance holes, with a relatively thick layer of an insulative dielectric material, such as teflon, polyurethane, p.v.c., or the like. The coated voltage plate is then drilled or punched with an array of smaller connecting holes, on the order of 40 mils in diameter, through which contacts to be electrically connected with voltage will be pressed. Since the connecting holes are made after the plate has been coated with a dielectric, the insides of the connecting holes will comprise bare metal and, hence, make good electrical connection with a contact portion press fitted therein. The coated ground p…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.