Bare die tray with flat datum surface

Abstract

In one embodiment of the present invention, a component tray includes a component housing portion having a plurality of component pockets, with each pocket opening to a component housing top surface. The tray has a flange around the component housing portion defining a perimeter of the tray. A flange top surface in one embodiment is below the component housing top surface. A plurality of bosses extend downward from a flange bottom surface, and are designed to be positioned in dis-alignment with burrs caused by contact of mold ejector pins with flange bottom and top surfaces. The height of the bosses is designed to exceed the height of burrs, and therefore avoid contact of the burrs with any surface upon which the tray is set. A bottom cavity provides clearance for a tray component housing.

1 . A component tray comprising: 
 a component pocket housing having a plurality of component pockets opening to a housing top surface;    a tray surface having a plurality of bosses formed thereon and extending from said tray surface, wherein said bosses are positioned and configured to have a height sufficient to prevent a burr on said tray surface from contacting another surface in contact with said tray.    
   
   
       2 . A tray as recited in  claim 1  wherein said tray surface is on a flange extending from said component pocket housing.  
   
   
       3 . A tray as recited in  claim 2  wherein said tray surface is on a bottom of said flange.  
   
   
       4 . A tray as recited in  claim 3  wherein said tray surface is on a top surface of said flange.  
   
   
       5 . A tray as recited in  claim 3  wherein said another surface is a top surface of a flange of another tray.  
   
   
       6 . A tray as recited in  claim 4  wherein said another surface is a bottom surface of a flange of another tray.  
   
   
       7 . A tray as recited in  claim 2  wherein said tray is formed in a mold, and said burrs are formed by contact of mold ejector pins with said flange.  
   
   
       8 . A tray as recited in  claim 7  wherein said bosses provide reference surfaces allowing accurate calibration of said housing top surface.  
   
   
       9 . A component tray comprising: 
 a component pocket housing having a plurality of component pockets opening to a housing top surface; and    a tray surface having a plurality of bosses formed thereon and extending from said tray surface, wherein said bosses are for preventing burrs on another surface making contact with said tray.    
   
   
       10 . A tray as recited in  claim 9  wherein said tray surface is on a flange extending from said component pocket housing.  
   
   
       11 . A tray as recited in  claim 10  wherein said tray surface is on a bottom of said flange.  
   
   
       12 . A tray as recited in  claim 10  wherein said tray surface is on a top of said flange.  
   
   
       13 . A tray as recited in  claim 10  wherein said another surface is a top surface of a flange of a second tray.  
   
   
       14 . A tray as recited in  claim 13  wherein said burr is caused by contact of a mold ejector pin with said tray surface of said flange of said second tray.  
   
   
       15 . A tray as recited in  claim 13  wherein said second tray is formed in a mold and said burrs are formed by contact of mold ejector pins with said flange.  
   
   
       16 . A method of tray manufacture comprising: 
 forming a plurality of bosses on a surface of a tray flange using a mold, wherein said tray is for holding a plurality of semiconductor devices; and    applying a mold ejector pin to said flange to eject said tray from said mold.    
   
   
       17 . A method as recited in  claim 16  wherein said bosses are formed on a bottom surface as said flange, and said mold ejector pins contact a top surface of said flange, and wherein said pins are in dis-alignment with said bosses.  
   
   
       18 . A method as recited in  claim 16  where said bosses are formed on a bottom surface of said flange, and said ejector pins contact a bottom surface of said flange.