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          EEPW首頁(yè) 
	 > EDA/PCB > 設(shè)計(jì)應(yīng)用 > Backdrill相關(guān)設(shè)置及Backdrill文檔輸出方法
          
    
          

          

          


	
	
	

          
	
          
		
          
			
          Backdrill相關(guān)設(shè)置及Backdrill文檔輸出方法
          
						
          
				作者：
				時(shí)間：2010-05-11
				來源：網(wǎng)絡(luò)
				
				
				
				
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          本文引用地址：http://www.ex-cimer.com/article/191721.htm
          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.有些場(chǎng)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 
          
				
            
          
                
			
							
          
                
			            
                            
              
            
          
		
          
		
          
		
          
		
          
		
          
			
            
				
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          關(guān)鍵詞：
            			            Backdrill
                        文檔
                        方法
                        
                        
            
          
            
			
          
		
          	
		

	

          
	
	
          
		
          
			
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