Soldered interconnect for a printed circuit board having an angular radial feature

Abstract

According to exemplary embodiments, a tapered surface interconnect is formed on a printed circuit board (PCB). A compliant pin of an electrical connector may be coupled to the tapered surface interconnect and soldered thereto. The surface interconnect may be formed by drilling through one or more layers of the PCB. The depth of the surface interconnect may be shorter than a height or a thickness of the PCB. The surface interconnect may have a tapered side wall to allow for a better fit with a tapered compliant pin. The inclination of the side wall of the surface interconnect may be linear or concave. The intersection between the tapered sidewall and the bottom of the surface interconnect may be rounded to minimize pin insertion issues and may allow for easier solder flux evacuation from the surface interconnect during the soldering process. The compliant pin may be soldered into place upon being coupled to the tapered surface interconnect.

That which is claimed: 
     
         1 . A printed circuit board comprising:
 a multi-layer body sandwiched between a top surface and a bottom surface; and   at least one tapered surface interconnect mechanically drilled on the top layer,   wherein the at least one tapered surface interconnect:
 has one or more tapered side walls, and 
 is sized and configured to accept a compliant pin and solder. 
   
     
     
         2 . The printed circuit board of  claim 1 , wherein the at least one tapered surface interconnect is a plated tapered hole on the printed circuit board. 
     
     
         3 . The printed circuit board of  claim 1 , wherein a depth of the plated tapered hole is smaller than a thickness of the printed circuit board formed by a distance between the top surface and the bottom surface. 
     
     
         4 . The printed circuit board of  claim 1 ,
 wherein an inclination of a side wall of the at least one tapered surface interconnect is an angle up to 15°, and   wherein an intersection between the side wall of the at least one tapered surface interconnect and a bottom of the at least one tapered surface interconnect is rounded.   
     
     
         5 . An electrical connector comprising:
 a connector body; and   a connection pin provided at a first end of the connector body, wherein the connection pin includes:
 a tapered end, and 
 a groove formed above the tapered end of the connection pin. 
   
     
     
         6 . The electrical connector of  claim 5 , wherein the connection pin further includes an anchoring feature at an extremity of the tapered end. 
     
     
         7 . The electrical connector of  claim 5 , wherein the connection pin further includes a plurality of grooves above the tapered end. 
     
     
         8 . The electrical connector of  claim 5 , wherein a corset anchor is coupled to an extremity of the tapered end. 
     
     
         9 . An electrical interconnect assembly comprising:
 a printed circuit board including:
 a multi-layer body sandwiched between a top surface and a bottom surface; and 
 at least one tapered surface interconnect formed on the top surface; and 
   an electrical connector coupled to the at least one tapered surface interconnect of the printed circuit board,
 wherein the electrical connector includes:
 a connector body, 
 a connection pin provided at a first end of the connector body,
 wherein the connection pin includes: 
  a tapered end, and 
  a groove formed above the tapered end of the connection pin, 
  wherein the connection pin is soldered to the top surface of the printed circuit board at the groove. 
 
 
   
     
     
         10 . The electrical interconnect assembly of  claim 9 , wherein a profile of the tapered end of the connection pin matches a profile of the tapered surface interconnect. 
     
     
         11 . The electrical interconnect assembly of  claim 9 , wherein a taper angle of the tapered end of the connection pin is substantially equal to a taper angle of the tapered surface interconnect. 
     
     
         12 . The electrical interconnect assembly of  claim 9 , wherein the tapered end of the connection pin is in electrical contact with the at least one tapered surface interconnect. 
     
     
         13 . The electrical interconnect assembly of  claim 9 , wherein the at least one tapered surface interconnect is a plated tapered hole on the printed circuit board. 
     
     
         14 . The electrical interconnect assembly of  claim 13 , wherein the tapered end of the connection pin is not in physical contact with a bottom surface of the at least one tapered surface interconnect. 
     
     
         15 . The electrical interconnect assembly of  claim 13 , wherein a depth of the plated tapered hole is smaller than a thickness of the printed circuit board formed by a distance between the top surface and the bottom surface. 
     
     
         16 . The electrical interconnect assembly of  claim 9 , wherein the electrical connector is soldered into the at least one tapered surface interconnect of the printed circuit board. 
     
     
         17 . The electrical interconnect assembly of  claim 9 , wherein a solder filet provided above the top surface of the printed circuit board is tapered. 
     
     
         18 . The electrical interconnect assembly of  claim 9 ,
 wherein an inclination of a side wall of the at least one tapered surface interconnect is an angle up to 15°, and   wherein an intersection between the side wall of the at least one tapered surface interconnect and a bottom of the at least one tapered surface interconnect is rounded.   
     
     
         19 . The electrical interconnect assembly of  claim 9 , wherein a corset anchor is coupled to an extremity of the tapered end of the electrical connector. 
     
     
         20 . The electrical interconnect assembly of  claim 9 , wherein the soldering creates pressure at the grove to prevent the electrical connector from decoupling from the printed circuit board.