Abstract:
A physical vapor deposition device includes a chamber; a cathode and an opposite anode, a target material, and supporting device arranged in the chamber. The target material and the supporting device are positioned between the cathode and the anode. The supporting device includes a rotatable device and a hollow supporting plate. The hollow supporting plate is configured for securing the workpiece and exposing part of the workpiece where is needed to be coated. The hollow supporting plate is movably fastened to the rotatable device. A distance from the hollow supporting plate to the rotatable device can be adjusted when the hollow supporting plate is rotated together with the rotatable device in order to align workpiece with the target material.

Description:
BACKGROUND 
       [0001]    1. Technical Field 
         [0002]    The present disclosure relates to physical vapor deposition device. 
         [0003]    2. Description of Related Art 
         [0004]    Physical vapor deposition is a process of vaporizing target materials supported on a crucible and coating a film on a workpiece by the vaporized target material. 
         [0005]    A typical physical vapor deposition device includes a vacuum container, a support member, and a crucible. The support member is fixed on an inner surface of the vacuum container by threaded screws and positioned above the crucible. In coating, when a lot of workpieces such as mobile-phone shells that are positioned around a target material are needed to be coated simultaneously, considering the space limitation of the vacuum container, it is difficult for us to arrange the workpieces in such a manner that each of the workpieces is just aligned with the target material and opposite to the target material. Thus, it is hard to coat each workpiece and form a film with an identical thickness on each workpiece. 
         [0006]    Therefore, a new physical vapor deposition device is desired to overcome the above-described shortcoming. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0007]    The components in the drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of at least one embodiment. In the drawings, like reference numerals designate corresponding parts throughout the various views. 
           [0008]      FIG. 1  is schematic, side view of a physical vapor deposition device according to one embodiment. 
           [0009]      FIG. 2  is a partial perspective view of the physical vapor deposition device of  FIG. 1 . 
           [0010]      FIG. 3  is a partial exploded view of the physical vapor deposition device of  FIG. 1 . 
           [0011]      FIG. 4  is a partial perspective view of the physical vapor deposition device of  FIG. 1  in a different view angle. 
       
    
    
     DETAILED DESCRIPTION 
       [0012]    Reference will now be made to the drawings to describe various inventive embodiments of the present disclosure in detail, wherein like numerals refer to like elements throughout. 
         [0013]    Referring to  FIGS. 1 to 4 , a physical vapor deposition device  100  for coating workpieces (only one workpiece is shown)  200  according to one embodiment of present disclosure is shown. The physical vapor deposition device  100  includes a chamber  110 , a cathode  120 , an anode  130 , a supporting device  140 , a target material  150 , a controller  160  and a power supply device  170 . 
         [0014]    The chamber  110  is grounded and made of metal materials. A space  112  is defined in the chamber  110  for accommodating the workpieces  200 , the cathode  120 , the anode  130 , the supporting device  140 , and the target material  150 . The physical vapor deposition device  100  further includes a vacuum device  114  and a gas supply device  116 . In one embodiment, the vacuum device  114  is a vacuum air pump configured to vacuumize the space  112 . The gas supply device  116  is configured to introduce inert gases such as argon and xenon into the chamber  110 . 
         [0015]    The cathode  120  and the anode  130  are formed on an internal cylinder wall of the chamber  110  and arranged to be on opposite sides of the internal cylinder wall  144 . 
         [0016]    The supporting device  140  is positioned between the cathode  120  and the anode  130  and includes a first driving device  142 , a rotatable device  144 , four second driving devices  146 , four supporting poles  148 , and a hollow supporting plate  149 . In an alternative embodiment, the number of the second driving devices  146  are three. 
         [0017]    The first driving device  142  includes a first driving body  1422  and a rotatable first shaft  1424  extending from the first driving body  1422  as shown in  FIG. 3 . Each second driving device  146  includes a second driving body  1462  and a rotatable second shaft  1464  extending from the second driving body  1462 . In one embodiment, the first driving device  142  and the second driving device  142  are motors. 
         [0018]    Referring to  FIG. 3 , in one embodiment, the rotatable device  144  has a disc-shaped configuration and includes a first surface  1442  and a second surface  1444 . The first surface  1442  and the second surface  1444  are on opposite sides of the rotatable device  144 . Four restricting through holes  1446  are defined in the rotatable device  144  and each extends from the first surface  1442  to the second surface  1444 . The four restricting through holes  1446  are positioned along a circumference of the rotatable device  144  and arranged symmetrically according to a center of the rotatable device  144 . A center of the first surface  1442  of the rotatable device  144  is fastened to an end of the first shaft  1424 . The rotatable device  144  is rotatable by the first shaft  1424  around first shaft  1424  as shown in  FIG. 1 . 
         [0019]    The second driving bodies  1462  of the four second driving devices  146  are aligned with the four restricting through holes  1446  correspondingly and fastened to the first surface  1442  of the rotatable device  144 . The four second shafts  1464  of the four second driving devices  146  are accommodated in the four restricting through holes  1446  correspondingly. Each second shaft  1464  includes screw thread  1466  formed on its distal part. 
         [0020]    Each supporting pole  148  includes a first end  1482  defining a screw hole  1486 , and an opposite second end  1484  fastened to the hollow supporting plate  149 . A diameter of each supporting pole  148  is slightly shorter than a diameter of each restricting through hole  1446  so as to facilitate the four supporting poles  148  to be movably accommodated in the four restricting through holes  1446 , correspondingly. The four second shafts  1464  are threaded into the screw holes  1486  of the four supporting poles  148 , respectively. The supporting poles  148  together with the hollow supporting plate  149  can be moved up and down along a direction perpendicularly to the second surface  1444  of the rotatable device  144  when the second shafts  1464  are rotated by the second driving bodies  1462  as shown in  FIG. 1 . 
         [0021]    The hollow supporting plate  149  is circular or annular defining a plurality of notches  1492 . The plurality of notches  1492  are arranged along a circumference of an internal sidewall of the hollow supporting plate  149  and configured to receive the workpieces  200  correspondingly as shown in  FIG. 2 . In one embodiment, the workspieces  200  are attached and fastened to the hollow supporting plate  149  when a middle part of each workspiece  200  is received in one notch  1492 . In an alternative embodiment, each workspiece  200  includes a first magnetic part with positive polarity and the hollow supporting plate  149  includes a second magnetic part with negative polarity. Thus, the workspieces  200  are attached into the notches of the hollow supporting plate  149  by the magnetic attraction force. 
         [0022]    The target material  150  is upright arranged between the cathode  120  and the anode  130  as shown in  FIG. 1 . One end of the target material  150  is fastened to the top of the chamber  110  over the rotatable device  144 . The other end of the target material  150  passes through the hollow supporting plate  149  so that a middle part of the target material  150  faces the workspieces  200 . In one embodiment, the target material  150  has an elongated cubic shape or a columnar shape and extends along a direction perpendicular to the hollow supporting plate  149 . 
         [0023]    The power supply device  170  and the controller  160  are positioned outside the chamber  110 . The power supply device  170  are electrically coupled to the controller  160 , the vacuum device  114 , the gas supply device  116 , the first driving device  142 , and the four second driving device  146  for providing operation voltages to them. The power supply device  170  is further electrically connected to the cathode  120  and the anode  130  and configured for providing a high voltage of about several thousands volts across the cathode  120  and the anode  130 . The controller  160  is used to control a first process, a second process, a third process, and a fourth process. The first process controls the vacuum device  114  to vacuumize the space  112  of the chamber  110 . The second process controls the gas supply device  116  to introduce inert gases into the space  112  of the chamber  110 . The third process controls the first driving device  142  to rotate the first shaft  1424 . The fourth process controls the second driving devices  146  to rotate the second shafts  1464 . 
         [0024]    To coat the workspieces  200 , the vacuum device  114  vacuumizes the space  112  of the chamber  110 . The gas supply device  116  introduces argon into the space  112  of the chamber  110 . The power supply device  170  provides the high voltage across the cathode  120  and the anode  130  to ionize the argon. The argon ions are moved along a direction from the anode  130  to the cathode  120  by a electric field generated by the high voltage, thereby crashes a surface of the target material  150 . The high speed argon ions collide with the atoms of the target material  150 . As a result, the atoms of the target material  150  become scattered and deposit on a surface of each workspiece  200  to form a coating film. 
         [0025]    Because hollow supporting plate  149  together with the supporting poles  148  of the supporting device  140  can be driven by the first and second driving device  142 ,  146  to rotate around the target material  150  and move up and down along the target material  150  as shown in  FIG. 1 , the positions of the workpieces  200  attached to the hollow supporting plate  149  can be adjusted to substantially face the target material  150 . Thus, the coating film formed on workspieces  200  has a uniform thickness. 
         [0026]    It is to be understood, however, that even though numerous characteristics and advantages of certain inventive embodiments have been set out in the foregoing description, together with details of the structures and functions of the embodiments, the disclosure is illustrative only; and that changes may be made in detail, especially in matters of arrangement of parts within the principles of present invention to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.