Drilling method for PCBs with high hole position precision
US10064284B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 19, 2014 |
| Grant date | Aug 28, 2018 |
| Priority date | — |
| Expiry date | Dec 19, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K2203/0207
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
Disclosed is a drilling method for PCBs with high hole position precision, comprising: step 1 of fixing a PCB on a workbench; step 2 of pre-drilling a to-be-drilled portion of the PCB by using a short-blade drilling tool; and step 3 of deeply drilling the to-be-drilled portion which has been machined in step 2 by using along-blade drilling tool. The PCB is fixed in step 1 to prevent the PCB from moving during drilling which otherwise would affect the drilling precision; the to-be-drilled portion of the PCB is pre-drilled by using a short-blade drilling tool in step 2, and the short-blade drilling tool has a higher rigidity than along-blade drilling tool and thus will not easily slide at the moment of contacting the surface of the PCB; and the to-be-drilled portion which has been machined in step 2 is deep drilled by using the long-blade drilling tool in step 3, and the long-blade drilling tool has reduced sliding upon entry, thus guaranteeing the entry alignment of the long-blade drilling tool in the case of deep drilling, so that the drilled hole meets the requirement of high hole position precision for PCBs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.