Transfer device for semiconductor wafer
Technical Field
The utility model relates to a transfer device for the transfer of semiconductor disk.
Background
With the rapid development of economic construction in China, the demand of the market for wafers is increasing day by day, so that the rapid development of the semiconductor wafer processing industry is driven.
In the field of semiconductor technology, semiconductor wafers are typically silicon wafers or wafers of other semiconductors. At present, a slide bearing plate is placed on a processing station, a process cavity for supporting a processed wafer is arranged on the slide bearing plate, a lifting device is arranged at the lower part of the slide bearing plate, and an ejector pin for supporting the wafer is inserted into the lifting device. When processing wafers, the wafers are typically transferred into and out of the process chamber by a dedicated transfer device.
The conventional transfer device comprises a base, wherein a transfer manipulator is arranged on the base, a transfer clamp is arranged at an execution end of the transfer manipulator, the transfer manipulator controls the transfer clamp to swing and lift between a sheet taking station and a placing station, the transfer clamp adopts a U-shaped support ring, and when sheets are sent, a support ring support disc is driven by the transfer manipulator to enable the wafer to be higher than the upper surface of a sheet carrying disc by a certain distance; at the moment, the lifting device positioned above supports the wafer on the support ring through the ejector pin, the mechanical arm is withdrawn later, and then the lifting device moves downwards to stably place the wafer into the process cavity of the wafer carrying disc to start processing; after the processing is finished, the lifting device moves upwards to support the wafer to a certain height, and the support ring of the mechanical arm stretches into the process cavity again to take away the wafer.
However, this transfer device has the following problems: firstly, the support ring only supports the wafer and is not fixed, so that looseness can occur in the transferring process; secondly, this kind of transfer anchor clamps need supporting elevating gear and three thimble, still need the action of jacking simultaneously, leads to the action relatively complicated like this, and three thimble is easy to be damaged, and it is very troublesome to maintain.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: the transfer device for the semiconductor wafer is capable of clamping the semiconductor wafer well, preventing the wafer from loosening in the transfer process, and meanwhile, jacking of the ejector pins is not needed any more, so that the reliability is higher.
In order to solve the technical problem, the technical scheme of the utility model is that: the utility model provides a transfer device of semiconductor disk, includes the base, the installation shifts the manipulator on the base, shift and install the anchor clamps that shift on the execution end of manipulator, shift the manipulator control and shift anchor clamps and get a station and place beat and go up and down between the station, shift anchor clamps and include the support arm and install the annular clamp ring that is used for the centre gripping disk on the support arm, the support arm is installed in the end that shifts the manipulator, and this clamp ring includes a plurality of sections clamp ring section, and the one end of every clamp ring section is provided with curved inserted bar, and the other end is provided with the jack with curved inserted bar adaptation, and the inserted bar of every clamp ring section forms annular structure in inserting another adjacent clamp ring section's jack, and the inboard bottom of every clamp ring section all is provided with the block tongue, and the bottom parallel and level of this block tongue and the bottom of clamp ring section, and the inboard thickness of block tongue from inside to outside crescent, wherein two adjacent clamp, the support arm and each clamping ring segment are provided with an opening and closing mechanism for driving the clamping ring segments to open and close, a wafer carrying disc is arranged on the wafer taking station, a process cavity for placing wafers is arranged on the wafer carrying disc, and notches which are matched with the clamping tongues in a one-to-one correspondence mode are formed in the cavity wall of the process cavity.
As a preferred scheme, the opening and closing mechanism comprises a compression spring sleeved on each inserted link, a traction steel wire is installed on the periphery of each clamping ring segment, and a winding and unwinding power device for driving the traction steel wire to wind or unwind is installed on the support arm.
As a preferred scheme, the winding and unwinding power device comprises a speed reduction motor arranged on the support arm, a winding wheel is arranged on an output shaft of the speed reduction motor, the traction steel wire is wound on the winding wheel, and the winding wheel is driven by the speed reduction motor to rotate forward and backward.
As a preferred scheme, the support arm includes first support arm and second support arm, and the leading wheel is just installed respectively in the one end slidable mounting of this first support arm and second support arm on the installation base, sets up the guide structure who makes things convenient for first support arm and second support arm mutual slip between first support arm and the second support arm, the other end of first support arm and second support arm and the one end fixed connection of two adjacent ring clamping segments, draw the wire around the periphery round of each ring clamping segment after through the leading wheel after the winding on the winding wheel again.
Preferably, each of the ring segments has a wire through hole formed in an outer periphery thereof, the first and second arms have wire passing passages extending in a longitudinal direction thereof, and the traction wire passes through the wire through holes and the wire passing passages.
Preferably, the guide structure includes a guide rod extending between the first arm and the second arm.
Preferably, the latch is a triangular latch, and the upper surface of the latch is arranged to be a plane.
As a preferred scheme, the number of the process cavities on the slide glass disc is multiple, the process cavities are uniformly distributed relative to the circle center circumference of the slide glass disc, and the slide glass disc is driven by a rotary power device.
As a preferred scheme, each notch comprises a side notch and a bottom notch which are communicated with each other, the side notches are arranged on the side wall of the process cavity, and the bottom notches are arranged at the bottom of the process cavity to form a notch structure.
As a preferred scheme, the manipulator comprises a lifting rod vertically installed on the base in a lifting mode, the lifting rod is connected with a piston rod of a lifting cylinder at the bottom of the base, the upper end of the lifting rod is provided with the deflection manipulator, and a sealing corrugated pipe is sleeved outside the lifting rod.
After the technical scheme is adopted, the utility model discloses an effect is: because the transfer device comprises a base, a transfer manipulator is arranged on the base, a transfer clamp is arranged on an execution end of the transfer manipulator, the transfer manipulator controls the transfer clamp to swing and lift between a sheet taking station and a placing station, the transfer clamp comprises a support arm and a circular clamping ring which is arranged on the support arm and is used for clamping a circular sheet, the support arm is arranged at the tail end of the transfer manipulator, the clamping ring comprises a plurality of clamping ring segments, one end of each clamping ring segment is provided with an arc-shaped inserted rod, the other end of each clamping ring segment is provided with a jack matched with the arc-shaped inserted rod, the inserted rod of each clamping ring segment is inserted into the jack of another adjacent clamping ring segment to form a ring structure, the bottom of the inner side of each clamping ring segment is provided with a clamping tongue, the bottom of the clamping tongue is level with the bottom of the clamping ring segment, the thickness of the inner side of the clamping tongue is gradually increased from, the support arm and each clamping ring section are provided with an opening and closing mechanism for driving the clamping ring sections to open and close, a wafer carrying disc is arranged on the wafer taking station, a process cavity for placing wafers is arranged on the wafer carrying disc, notches matched with the clamping tongues in a one-to-one correspondence mode are arranged on the cavity wall of the process cavity, therefore, in the actual transfer process, the clamping rings move to the upper side of the wafers and descend, the clamping ring sections are in an open state, the clamping tongues fall into the notches, the clamping ring sections are mutually folded, the clamping tongues push the wafers from the bottoms of the wafers, the wafers enter the supporting areas of the clamping tongues, the wafers are also lifted by a small distance, meanwhile, the clamping ring sections are continuously close to and clamp the edges of the wafers, the wafers are supported by the clamping tongues and are also clamped by the clamping ring sections, and the transfer clamp can well clamp the wafers and avoid the loosening of the wafers in the transfer process, meanwhile, the ejector pin does not need to be used for jacking, and the reliability is higher.
And the opening and closing mechanism comprises a compression spring sleeved on each inserted rod, traction steel wires are arranged on the periphery of each clamping ring section, and a winding and unwinding power device for driving the traction steel wires to wind or unwind is arranged on the support arms. The traction steel wire can be wound by the winding and unwinding power device, so that the clamping ring section is folded, when the traction steel wire is unwound, under the elastic force action of the compression spring, the clamping ring section is expanded, opening and closing are achieved, the clamping force can be well controlled through the length of the wound traction steel wire, meanwhile, the compression spring is sleeved on the inserted rod, and therefore when the compression spring is completely contracted, the compression spring cannot be compressed any more, the limit clamping force of the clamping ring section can be controlled, and accordingly the clamping force is prevented from being too large. The drawing or expanding stroke of the clamping ring section is set to be smaller, the diameter change of the drawing or expanding of the clamping ring section only needs the full clamping tongue to enter the machine shell from the outer edge of the disc, and therefore the drawing or expanding of the clamping ring section can be met only by slightly increasing the diameter of the jack to the inserted rod, and the clamping is convenient.
And because the clamping tongue is a triangular clamping tongue, the upper surface of the clamping tongue is arranged into a plane. So that the upper surface of the latch can better support the wafer.
And each notch comprises a side notch and a bottom notch which are mutually communicated, the side notch is arranged on the side wall of the process cavity, and the bottom notch is arranged at the bottom of the process cavity to form a notch structure, so that when the clamping ring section is folded, the clamping tongue enters from the side notch and then the tip of the clamping tongue passes through the bottom notch, the clamping tongue can easily enter the bottom of the wafer, the thickness of the clamping tongue is gradually increased when the clamping tongue gradually approaches, and finally the wafer is supported by the clamping tongue, so that the whole action is high in reliability and very smooth.
And the manipulator comprises a lifting rod vertically arranged on the base in a lifting way, the lifting rod is connected with a piston rod of a lifting cylinder at the bottom of the base, the upper end of the lifting rod is provided with the deflection manipulator, and a sealing corrugated pipe is sleeved outside the lifting rod. Utilize sealed bellows can satisfy transfer device and use under vacuum environment, sealed bellows isolated lifter and the inside vacuum of environment, ensure that the environment vacuum is stable.
Drawings
The present invention will be further explained with reference to the drawings and examples.
Fig. 1 is a perspective view of an embodiment of the present invention;
fig. 2 is a top view of a transfer fixture according to an embodiment of the present invention;
FIG. 3 is an enlarged schematic view of FIG. 1 at A-A;
FIG. 4 is a perspective view of a binder ring segment;
in the drawings: 1. a base; 2. a lifting cylinder; 3. sealing the corrugated pipe; 4. a first crank arm; 5. a second crank arm; 6. transferring the clamp; 61. installing a base; 62. a support; 63. a winding wheel; 64. a reduction motor; 65. a guide wheel; 66. a support arm; 67. a binder ring segment; 671. a jack; 672. inserting a rod; 68. a latch; 681. an upper surface; 69. a compression spring; 610. a traction wire; 611. the steel wire penetrates through the hole part.
Detailed Description
The present invention will be described in further detail with reference to the following examples.
As shown in fig. 1 to 4, the semiconductor wafer transfer device comprises a base 1, wherein a transfer manipulator is mounted on the base 1, a transfer clamp 6 is mounted on an execution end of the transfer manipulator, and the transfer manipulator controls the transfer clamp 6 to swing and lift between a wafer taking station and a placing station.
The transfer device of the embodiment can operate in a common environment and can also operate in a vacuum environment. Such as in a vacuum environment during etching of semiconductor wafers.
The transfer fixture 6 comprises a support arm 66 and a circular ring-shaped clamping ring which is arranged on the support arm 66 and used for clamping a wafer, the support arm 66 is arranged at the tail end of a transfer manipulator, the clamping ring comprises a plurality of clamping ring segments 67, one end of each clamping ring segment 67 is provided with an arc-shaped insertion rod 672, the other end of each clamping ring segment 67 is provided with a jack 671 matched with the arc-shaped insertion rod 672, the insertion rod 672 of each clamping ring segment 67 is inserted into the jack 671 of another adjacent clamping ring segment 67 to form a ring-shaped structure, the bottom of the inner side of each clamping ring segment 67 is provided with a clamping tongue 68, the bottom of the clamping tongue 68 is flush with the bottom of the clamping ring segment 67, the thickness of the inner side of the clamping tongue 68 is gradually increased from inside to outside, wherein two adjacent clamping ring segments 67 are arranged on the support arm 66, opening and closing mechanisms for driving the clamping ring segments 67 to open and close are arranged on the support arm 66 and each clamping ring segment 67, notches which are correspondingly matched with the clamping tongues 68 one by one are arranged on the wall of the process cavity.
Wherein, support arm 66 includes first support arm and second support arm, and the one end slidable mounting of this first support arm and second support arm just installs leading wheel 65 respectively on installation base 61, and wherein the one end slidable mounting of this first support arm and second support arm is in the concrete structure of installation base 61: be provided with support 62 at the upper surface 681 of installation base 61, support 62 includes two stands, and the level and the installation pole that is parallel to each other are installed to the upper end of stand, the bottom of first support arm and second support arm is provided with two installation section of thick bamboos, first support arm and second support arm are passed through installation section of thick bamboo suit and are realized sliding on the installation pole, the contained angle of first support arm and second support arm is between 1-2. The first arm and the second arm have a certain angle, so that when the clamping ring section 67 is folded or unfolded, the sliding amplitude between the first arm and the second arm at the end with the guide wheel 65 is smaller, and the running and the winding of the steel wire are more facilitated.
Set up the guide structure who makes things convenient for first support arm and second support arm mutual slip between first support arm and the second support arm, the other end of first support arm and second support arm and the one end fixed connection of two adjacent ring binder sections 67, traction wire 610 passes through behind the periphery round of each ring binder section 67 after through leading wheel 65 winding on wind-up wheel 63. The guide structure comprises a guide rod, and the guide rod penetrates through the space between the first support arm and the second support arm.
As shown in fig. 1 and 3, the opening and closing mechanism includes a compression spring 69 sleeved on each insertion rod 672, a traction wire 610 is installed on the periphery of each clamping ring segment 67, and a winding and unwinding power device for driving the traction wire 610 to wind or unwind is installed on the support arm 66. The winding and unwinding power device comprises a speed reducing motor 64 arranged on a support arm 66, a winding wheel 63 is arranged on an output shaft of the speed reducing motor 64, the traction steel wire 610 is wound on the winding wheel 63, and the winding wheel 63 is driven by the speed reducing motor 64 to rotate forward and backward. The outer periphery of each of the ring segments 67 is provided with a wire through hole portion 611, the first arm and the second arm are provided with a threading channel extending along the length direction thereof, and the traction wire 610 passes through each of the wire through hole portions 611 and the threading channels.
The latch 68 is a triangular latch 68, and an upper surface 681 of the latch 68 is formed in a plane.
The number of the process cavities on the slide glass disc is multiple, the process cavities are uniformly distributed relative to the circle center circumference of the slide glass disc, and the slide glass disc is driven by a rotary power device. Each notch comprises a side notch and a bottom notch which are communicated with each other, the side notches are arranged on the side wall of the process cavity, and the bottom notches are arranged at the bottom of the process cavity to form a notch structure.
As shown in fig. 1, the transfer manipulator includes a lifting rod vertically installed on a base 1, the lifting rod is connected with a piston rod of a lifting cylinder 2 at the bottom of the base 1, a deflection manipulator is installed at the upper end of the lifting rod, a sealing corrugated pipe 3 is sleeved outside the lifting rod, and the sliding part of the lifting rod can be sealed by using the sealing corrugated pipe 3, so that the vacuum manipulator is suitable for a vacuum environment. The deflection manipulator is the prior art at present and has the following patent numbers: 200910242381.3 and 201010523079.8 disclose specific configurations of several yaw manipulators. The beat manipulator in this embodiment adopts 201010523079.8 the structure of fig. 1, and it includes first crank arm 4 and second crank arm 5, and first crank arm 4 one end is rotated through the bearing and is installed on the lifter, and the other end passes through the bearing rotation with the one end of second crank arm 5 to be connected, and the other end of second crank arm 5 is rotated through the bearing and is installed installation base 61, and step motor and hold-in range are installed respectively to the inside of first crank arm 4 and second crank arm 5 to this realization is rotatory and flexible. The structure of the deflection manipulator in the embodiment is clear, which is commercially available from the automated new release robot gmbh.
Various motors, synchronous belts, winding wheels 63 and the like mentioned in the embodiment are conventional technologies at present, and are recorded in detail in the fifth edition of mechanical design manual printed in the twenty-eighth edition of Beijing in 4 months in 2008, and the structure of the fifth edition of mechanical design manual is clear and clear.
The above-mentioned embodiments are merely descriptions of the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and various modifications and alterations made to the technical solution of the present invention without departing from the spirit of the present invention are intended to fall within the scope of the present invention defined by the claims.