Abstract:
An arrangement comprising ancillary equipment mounted to a semiconductor processing tool and service center remote from the semiconductor processing tool minimizing the local space requirements and facilitates easy access for repair.

Description:
BACKGROUND OF THE INVENTION  
       [0001]     The present invention relates to an arrangement for mounting ancillary equipment that functions in connection with a semiconductor processing tool. The equipment sections lack facilities and contain only the basic equipment mechanism and are mounted onto the semiconductor tool. More particularly, the present invention relates to such an arrangement in which a plurality of such equipment sections housing the ancillary equipment are connected to a service section which provides the facilities for operation of the equipment. This arrangement allows for easy access to the equipment sections for repair or servicing.  
         [0002]     The present invention also provides an arrangement in which ancillary equipment sections are mounted directly onto the semiconductor tool framework and connected to a service section which is at a location remote from the equipment section. In this manner, easy access to repair or service any ancillary equipment is facilitated while minimizing the requirements for space on the tool for equipment providing that function.  
         [0003]     A semiconductor processing facility is often constructed on two levels. The tools used in fabricating the semiconductors will then be situated on a main level while ancillary equipment may be located on a level beneath the main level known as a sub-fab. Each piece of ancillary equipment situated within the sub-fab will ideally be beneath the tool it services. For instance, many tools incorporate a vacuum chamber. A vacuum pump associated with a particular chamber will then be located beneath such chamber on the sub-fab level.  
         [0004]     While the placement of the equipment relative to the tools would appear to use the shortest runs of piping, in practice, however, excessive networks of piping result which can reduce efficiency or increase losses and make the layout and servicing of the equipment very difficult. Installation of the equipment is also problematic in that the equipment must not only be assembled within the fabrication facility, but also be tested within such facility. If any piece of equipment proves to be faulty, it and possibly other surrounding equipment must be removed and replaced. A still further problem is that often such tools utilize noxious, dangerous chemicals that are drawn off by, for instance, vacuum pumps for disposal by a variety of types of abatement systems.  
         [0005]     Accordingly, there is a need for an arrangement design which minimizes space requirements and facilitates removal and repair of equipment used in conjunction with semiconductor tools.  
       SUMMARY OF THE INVENTION  
       [0006]     The present invention provides an arrangement for mounting ancillary equipment to support a semiconductor processing tool. The arrangement includes a plurality of equipment sections lacking facilities and a service section. The ancillary equipment is mounted directly onto the semiconductor processing tool while the service section is at a location remote from the equipment sections. The service section which contains facility sources and is connected to the equipment sections provides facilities for operation of the equipment therein.  
         [0007]     In this manner, the space necessary for accommodating the equipment sections is minimized, yet each equipment section can easily be accessed for repair and servicing. This provides point of use service, e.g., pumping, thereby minimizing losses and maximizing efficiency. 
     
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0008]     While the specification concludes with claims distinctly pointing out the subject matter that Applicants regard as their invention, it is believed that the invention will be better understood when taken in connection with the accompanying drawings in which:  
         [0009]      FIG. 1  is a schematic view of an arrangement in which equipment sections are directly mounted to a semiconductor tool in accordance with the invention;  
         [0010]      FIG. 2  is a schematic view of an arrangement in which a pump is directly mounted to a semiconductor tool in accordance with the invention;  
         [0011]      FIG. 3  is schematic view of an arrangement in which the service section is directly mounted to the semiconductor tool in accordance with the invention.  
         [0012]      FIG. 4  is a schematic view of an arrangement in which the service section includes a pump in accordance with the invention;  
         [0013]      FIG. 5  is a schematic view of an arrangement in which a single carrier distributes facilities from the service section to all the equipment sections in accordance with the invention;  
         [0014]      FIG. 6 ( a ) an  6 ( b ) are a cross-sectional illustration of a carrier, and a perspective view of a carrier including bundled facility conduits, respectively, in accordance with the invention; and  
         [0015]      FIG. 7  is a perspective view of a carrier including a housing in accordance with the invention. 
     
    
     DETAILED DESCRIPTION  
       [0016]     With reference to  FIG. 1 , an arrangement in accordance with the present invention is illustrated in which equipment sections  2  lacking facilities are directly mounted onto a semiconductor processing tool framework  4 . A service section  6  includes facility sources for operation of the equipment sections  2 .  
         [0017]     Equipment components for semiconductor tools are well known to those skilled in the art and include but are not limited to pumps power supplies, valves and the like. The equipment components which are mounted on the tool include only the basic mechanism. For example, as shown in  FIG. 2 , a pump  8  typically includes several components including a pump mechanism  10 , a motor  12 , a drive  14 , a controller  16  and nitrogen module  18 . In an embodiment of the present invention schematically illustrated in  FIG. 2 , the basic pumping cartridge of the pump  10  and the motor  12  without controller  16  or other facilities is mounted onto the tool, such that it can be easily extracted for repair or service and minimizes the amount of space that it occupies on the tool. The controller  16 , drive  14  and nitrogen module  18  are centrally mounted in service section  6 . In this manner the basic pumping cartridge  10  and motor  12  can be easily extracted for repair or service without having to first dismantle the other pump components such as the controller  16 , drive  14  and nitrogen module  18 . This arrangement facilitates easy access to the components which need repair and minimizes downtime for the semiconductor processing tool.  
         [0018]     In an alternate embodiment shown in  FIG. 3  the service section  6  can be mounted onto the semiconductor processing tool  4  and/or may include at least one of, but not all, of the ancillary equipment. For example, as illustrated in  FIG. 4 , the service section  6  may include a pump which may serve as the primary connection point for the facilities and may also be the hub to distribute the facilities to other ancillary equipment.  
         [0019]     In a further embodiment shown in  FIG. 5  rather than a hub arrangement shown in  FIG. 1 , a single carrier  20  distributes facilities from service section  6  to all the equipment sections  2 .  
         [0020]     As will be understood by one skilled in the art, the mounting of the equipment component or service section onto the tool will be such that the equipment or service section is received in area which does not interfere with the function of tool or damage the tool in any manner, yet the location is such that the component can be easily extracted for repair or service. For example, the equipment component  2  and service section  6  can be attached to process tool  4  by flange mounting, bracket mounting, gluing or any other suitable means.  
         [0021]     The equipment component may be mounted on rectangular section supports that are configured to receive the tangs of a forklift vehicle and allow forklift removal as described in U.S. Pat. No. 6,058,852 which is incorporated by reference herein.  
         [0022]     Facilities for the equipment component  2  are provided from service section  6  through carrier  20  as shown in  FIG. 1 . Carrier  20  may be a single conduit carrying each facility or may include a collection of individual facilities bundled together. An illustration of a carrier in cross section for a pump is shown in  FIG. 6 ( a ). Facilities for a pump, for example, may include cooling water feed  22 , cooling water return  24 , nitrogen source  26 , control connection  28 , power  30  and clean dry air  32  to drive valves. The pump facilities may be bundled together by a tie wrap  34  as shown in  FIG. 6 ( b ). In an alternate embodiment shown in  FIG. 7 , the facilities are enclosed in a central housing  38 . A preferred pump is the EPX pump available from BOC Edwards, N.J.  
         [0023]     Although preferred embodiments are specifically illustrated and described herein above, it will be appreciated that many modifications and variations of the present invention are possible in light of the above teachings and within the purview of the appended claims without departing from the spirit and intended scope of the invention.