Patent Publication Number: US-2006019508-A1

Title: Terminal formation for socket employed on CPU

Description:
BACKGROUND OF THE INVENTION  
      1. Field of the Invention  
      This invention relates to a terminal formation for the socket especially employed on the CPU, in particular, the terminal is formed in the plane surface by one pressing operation, requiring further process of bending and soldering. A fast stable production and uniform quality can be secured and the worry of deformation is therefore eliminated.  
      2. Description of the Related Art  
       FIG. 1  shows the prior art of terminal used in the inner connector in which the terminal  6  is fixed on the retaining plate  61  with an arm  62  is extended from the center part of the retaining plate  61  to form a “U” form having a conductor  621  at one end and a contact  622  at the bottom end and exposed out of the insulation of the connector.  
      After the chip module is mounted to the connector, the conductor  621  and the contact  622  of the terminal  6  will link to the conductive body and conductive plate on the PCB respectively. Because the arm  62  of the terminal  6  is under constant compression of the chip module and the PCB, an elastic deformation is taking place. Once the elasticity of the arm  62  becomes stable, the conductor  621  and the contact  622  will keep a good contact and conductivity with the chip module and PCB.  
      However, once the conductor  621  of the long arm  62  makes the contact to the chip module and the PCB, the electrical current will flow from the chip module to the long arm. The L route the current has to travel from the chip module to the long arm and the PCB is long way. In the electricity, the longer the current travels, more impedance will generate. Impedance means heat, in the high frequency chip module, high impedance built up signifies lot of heat generated. In case the performance of the heat sink on the chip module is poor, the consequence is the element is burnt, service span is shortened and the circuit operation is interrupted.  
      In general, the terminal is usually press-formed, entailing soldering and bending aftermath. In the production process, bending is always leading to angular error due to the material quality and temperature influence; as a result, the quality of such terminal is poor.  
     SUMMARY OF THE INVENTION  
      The main object of this invention is to provide a terminal integrally formed in one pressing operation. It has a plane surface. The pressing operation is very simple, suitable for mass production with stable controllable quality and no deformation occurred in the future operation. It possesses high value for the terminal industry.  
      Another object of this invention is to provide a plane surface terminal for the socket used on the CPU. The terminal has two contacts bent into the “B” form so as to maintain adequate elastic contact.  
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       FIG. 1  shows the prior art of the terminal.  
       FIG. 2  shows the solid appearance of the terminal of this invention.  
       FIG. 3  shows the solid of the terminal is attached with the solder.  
       FIG. 4  shows the terminal of this invention is placed in the socket of the CPU.  
       FIG. 5  shows the connection of the terminal of this invention to the chip module and the PCB. 
    
    
     DETAILED DESCRIPTION OF THE INVENTION  
      The features and characteristics are explained in great detail with the aid of preferable embodiments as illustrated in the drawings attached.  
      As shown in  FIG. 2 , the terminal  1  for the socket used on the CPU as provided in this invention is integrally formed in one pressing operation, requiring no further process of bending and soldering. It renders no angular error, least deformation, stable quality and fast production.  
      The terminal  1  mainly consists of the body  11 , the first contact  12 , the second contact  13  and the soldering leg  14 . The terminal  1  links to the first contact  12 , the second contact  13  and the soldering leg  14  by means of the body  11 .  
      One end of the body  11  extends to form the first contact  12  and the center part extends to form the second contact  13 . Both contacts  12 ,  13  are bent symmetrically in the opposite position and maintain adequate elasticity.  
      Now pleas refer to  FIGS. 2 and 3 , this terminal  1  is press-formed and the soldering leg  14  is attached with a heat solder  3 , due to the forces of internal adduction and shrinkage, the solder  3  becomes a semicircle attached to the end of the soldering leg  14 .  
      As shown in  FIGS. 4 and 5 , the terminal  1  is placed in the slot  22  of the insulation  21  of the connector  2  and the catch ear  111  on the terminal body  11  is caught on the inner wall of the slot  22 . After the terminal  1  is fixed in place, the first contact  12  will partially pop out of the top of the slot  22  and the solder leg  14  is flush with the rim of the slot mouth  22 , but the solder  2  extends out of the slot  22 . The terminal  1  will be soldered to the PCB  4  when the solder  2  are heated and bind to the PCB.  
      The terminal  1  has the first contact  12  and the second contact  13 . The second contact  13  is capable to effective dissipate the heat or disperse the compression the chip  5  applies to the first contact  12  which will never be deformed or damage due to the compression applied by chip  5 .  
      The above statement pertaining to the novel terminal integrally formed for the socket used on the CPU is justified for the grant of a patent. Many changes and modifications in the above-described embodiments of the invention can, of course, be carried out without departing from the scope thereof. Accordingly, to promote the progress in science and the useful arts, the invention is disclosed and is intended to be limited only by the scope of the appended claims.