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Property | BACKDRILL_PRESSFIT_CONNECTOR |
Purpose | Use on pressfit connectors to permit backdrilling from both sides of the board. Backdrill depth will not protrude into contact range as defined by the property string. |
Usage | Optional |
Value | <value1:value2> where values = pin contact range; this value must be obtained from the manufacturer |
Objects | Symbols |
Backdrill analysis flag | n/a |
4.有些场合不能用此功能的可以用下面的命令排除.
Exclusions
It may be necessary to exclude certain objects from backdrilling even though stub violations are present. The BACKDRILL_EXCLUDE property can be applied to symbols, pins or vias at both the library and design level using Edit - Property. Common examples might include solder tail connectors or a dense pin escape pattern in BGA areas. The PCB designer should consult with a manufacturing engineer before assuming all pin/via objects are suitable for backdrilling.
Property | BACKDRILL_EXCLUDE |
Purpose | Excludes objects from backdrilling even though stub may be present |
Usage | Optional |
Value | Boolean (true/false) |
Objects | Symbols, pins, vias |
Backdrill analysis flag | X |
