Patent Publication Number: US-2005116730-A1

Title: Double-faced detecting devices for an electronic substrate

Description:
FIELD OF THE INVENTION  
      In general, the present invention relates to double-faced detecting devices for an electronic substrate, and more particularly to detecting devices that enables to alternatively place the electronic substrate in a horizontal position or a vertical position to detect high-frequency properties of the electronic substrate.  
     BACKGROUND OF THE INVENTION  
      With reference to  FIG. 5 , conventional detecting devices for an electronic substrate, such as a flip chip, a wafer or a printed circuit board (PCB), in high-frequency properties comprises two opposite probe-detecting machines  50  and a substrate platform  70 . Each probe-detecting machine  50  has a probe  51  secured on an inward face of the probe-detecting machine  50  and connects to a detecting system (example: networking analysis instrument) via a high-frequency isolation wire (not shown). The two probe-detecting machines  50  are respectively mounted on two bases  60 . The substrate platform  70  is located between the two probe-detecting machines  50 . The substrate platform  70  has a top face for securing the flip chip, the wafer or the printed circuit board (not shown).  
      When the detecting devices operate, a calibration substrate  90  with multiple detecting points  91  (or so-called “pads”) is placed on the top face of the substrate platform  70  for adjustment by the two probes  51  on the two probe-detecting devices  50 . After adjustment, the calibration substrate  90  is removed from the substrate platform  70 . Then, the flip chip, the wafer or the printed circuit board (not shown) with multiple detecting points is settled on the top face of the substrate platform  70 . The probes  51  on the probe-detecting machines  50  extend to touch multiple detecting points  91  to detect high-frequency properties of the electronic substrate.  
      However, the flip chip, the wafer or the printed circuit board usually has the multiple detecting points formed on a top face and a bottom face in an ideal configuration. For convenience in detection, most of the flip chips, the wafers or the printed circuit boards are designed to arrange the multiple detecting points of circuit on the same face. Unfortunately, data of high-frequency properties obtained from the designed wafers or the printed circuit boards are only simulating data that is not precise. Additionally, only 80% of the electronic substrates can be modified and be detected by the conventional detecting devices. Rest of the electronic substrate still can not be modified in circuit to arrange the multiple detecting points on the same face and thus can not be detected.  
     SUMMARY OF THE INVENTION  
      The present invention provides double-faced detecting devices for an electronic substrate in high-frequency properties, which conveniently contact multiple detecting points on two faces of the electronic substrate to detect the high-frequency properties.  
      To achieve the foregoing purpose, the double-faced detecting devices for an electronic substrate comprise: 
          a base with a substrate platform movably and rotatably attached to the base, and through hole defined in the substrate platform, wherein the substrate platform is adapted to settle the electronic substrate on the substrate platform and is controlled by a controlling device to locate at a horizontal position or a vertical position;     two pivot bases oppositely placed beside the substrate platform and each pivot base has a levering plate; and     two probe-detecting machines respectively and pivotally mounted on the levering plates of the two pivot bases, wherein each probe-detecting machine has a probe extending toward to the substrate platform to touch the electronic substrate.        

      Whereby, the electronic substrate is rotated and erected to the vertical position to expose two faces to respectively face the two probe-detecting machines to allow multiple detecting points on the two faces to be touched in a convenient way. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       FIG. 1  is a schematically side plane view of double-faced detecting devices for an electronic substrate in accordance with the present invention;  
       FIG. 2  is a schematically operational side plane view of the detecting devices for an electronic substrate in  FIG. 1 , wherein a substrate platform is located at a vertical position;  
       FIG. 3  is a schematically operational side plane view of the detecting devices in  FIG. 2 , wherein two probes of two opposite probe-detecting machines extend to touch multiple detecting points on two sides of the electronic substrate;  
       FIG. 4  is a partially enlarged side plane view of the detecting devices in  FIG. 3  to clearly show conjunctions of the probes and the detecting points of the electronic substrate; and  
       FIG. 5  is a schematically operational side plane view of conventional detecting devices for an electronic substrate in accordance with prior art. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT  
      With reference to  FIGS. 1 and 2 , double-faced detecting devices for an electronic substrate  40  in accordance with the present invention comprises a base  10  with a substrate platform  11 , two pivot bases  33 , two probe-detecting machines  30  respectively mounted on the two pivot bases  33 . Particularly, the electronic substrate  40  has a top face and a bottom face and multiple contacts  41  respectively arranged on the top and bottom faces.  
      The base  10  has an erecting post (not numbered) with a front face, an guiding groove  101  longitudinally defined in the front face of the erecting post, and the substrate platform  11  with a connecting rod  112  movably and rotatably attached to the erecting post via the guiding groove  101 . The substrate platform  11  has a top face. A through hole  114  is defined in the substrate platform  11  and has a diameter smaller than that of the electronic substrate  40 . Therefore, the electronic substrate  40  enables to be mounted on the top face of the substrate platform  11  and exposes the bottom face of the electronic substrate  40  via the through hole  114 . The substrate platform  11  is controlled by a controlling device (not shown) to move vertically to change the height of electronic substrate  40 . Additionally, the substrate platform  11  also enables to be rotated to hold the electronic substrate  40  at a horizontal position or a vertical position. Preferably, the substrate platform  11  rotates from 0 to 90 degrees.  
      The two pivot bases  33  are oppositely located beside the substrate platform  11 . Each pivot base  33  has a levering plate  32 . Each probe-detecting machine  30  is mounted on the levering plate  32  and has a probe  31  retractably extending toward to the electronic substrate  40 . Whereby, the probe-detecting machine  30  can be pivoted to allow the probe  31  being inclined to extend upward to reach the contacts  41  at high locations when the electronic substrate  40  is in the vertical position.  
      With further reference to  FIGS. 3 and 4 , when the detecting devices operate to probe the electronic substrate  40 , the substrate platform  11  horizontally arises and then rotates to the vertical position to expose the two faces of the electronic substrate  40  to respectively face the two probe-detecting machines  30 . Because the contacts  41  on the electronic substrate  40  are at high positions when the substrate platform  11  is arisen to the vertical position, the pivot bases  33  rotate the levering plates  32  to adjust inclinations of the two probes  31  on the two probe-detecting machines  30 . Thereby, the probes  31  enable to probe the contacts  41  to detect the high-frequency properties of the electronic substrate  40 .  
      For an actually complete operation, a calibration substrate is applied on the detecting devices initially for adjustment as described in the conventional ones. Then, a flip chip, a wafer or a printed circuit board is mounted on the top face of the substrate platform  11  to detect high-frequency properties. Operational procedures of the detecting devices for each detection of any electronic substrate, whether the calibration substrate or the flip chip, the wafer or the printed circuit board, are the same as described as in the conventional detecting devices.  
      Although particular and specific embodiments of the invention have been disclosed in some detail, numerous modifications will occur to those having skill in the art, which modifications hold true to the spirit of this invention. Such modifications are deemed to be within the scope of the following claims.