| 
             Technology 
             | 
            
             2009 
             | 
            
             2010 to 2011  
             | 
        
        
            | Finished Hole Size  | 
        
        
            | Mechanical Drill Size  | 
        
        
            | 
             >= 10 mils  
             | 
            
            
             | 
            
            
             | 
        
        
            | 
             = 8 mils  
             | 
            
            
             | 
            
            
             | 
        
        
            | Control Impedence  | 
        
        
            | 
             +/- 10% 
             | 
            
            
             | 
            
            
             | 
        
        
            | 
             +/- 8%  
             | 
            
            
             | 
            
            
             | 
        
        
            | Stack Via (Laser)  | 
        
        
            | 
             Epoxy Filled Vias  
             | 
            
            
             | 
            
            
             | 
        
        
            | 
             Fill Vias by Plating  
             | 
            
            
             | 
            
            
             | 
        
        
            | Materials | 
        
        
            | 
             Normal FR4 (Tg 135°C to 170°C) 
             | 
            
            
             | 
            
            
             | 
        
        
            | 
             Lead-Free FR4 (Tg 150°C to 170°C) 
             | 
            
            
             | 
            
            
             | 
        
        
            | 
             Halogen-Free FR4 (Tg 150°C to 170°C)  
             | 
            
            
             | 
            
            
             | 
        
        
            | Microvia Type  | 
        
        
            | 
             2 + 2 with Buried Hole (Staggered) 
             | 
            
            
             | 
            
            
             | 
        
        
            | 
             2 + 2 with Buried Hole (Stack-up) 
             | 
            
            
             | 
            
            
             | 
        
        
            | 
             3 + 3 with Buried Hole (Stack-up) 
             | 
              | 
            
            
             | 
        
        
            | Through/Buried hole Aspect Ratio (Mechanical) | 
        
        
            | 
             8 : 1 
             | 
            
            
             | 
            
            
             | 
        
        
            | 
             10 : 1 
             | 
            
            
             | 
            
            
             | 
        
        
            | Blind Hole Aspect Ratio(Laser) | 
        
        
            | 
             0.5 : 1 
             | 
            
            
             | 
            
            
             | 
        
        
            | 
             0.85 : 1 
             | 
            
            
             | 
            
            
             | 
        
        
            | Line/Space | 
        
        
            | 
             4/4 mils 
             | 
            
            
             | 
            
            
             | 
        
        
            | 
             3/3 mils 
             | 
            
            
             | 
            
            
             | 
        
        
            | Layers | 
        
        
            | 
             14 Layers 
             | 
            
            
             | 
            
            
             | 
        
        
            | 
             20 Layers 
             | 
              | 
            
            
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