Semiconductor refrigeration temperature control device
Technical Field
The invention relates to the field of temperature control of liquid medicine in semiconductor processing, in particular to a semiconductor refrigeration temperature control device.
Background
Etching is an important link in semiconductor production, generally referred to as photochemical etching, and refers to removing a protective film of an area to be etched after exposure plate making and development, and contacting with a chemical solution during etching to achieve the effect of dissolution and corrosion and form concave-convex or hollow-out forming. After the etching is accomplished, need wash semiconductor wafer, the cleaning process traditional chinese medicine liquid temperature can take place thereupon and rise the change, for the temperature that makes the liquid medicine reduces, guarantees simultaneously that the temperature after the new liquid medicine adds rapidly reduces, can set up cooling body in the liquid medicine groove usually, and the majority that uses at present is refrigeration type ice water machine, and the inside cooling coil temperature control of cell body, it is bulky, and the energy consumption is big, and the temperature control precision is poor, and basic control is at 0.5 ℃. Existing water chiller is mostly air-cooled water chiller and water-cooled water chiller, need regularly maintain the maintenance, and mostly one-way accuse temperature, after cooling to being less than preset temperature at every turn, just need stop the cooling, wait the temperature slowly rise again, the control by temperature change scope is uncontrollable like this, be difficult to the control when the higher processing procedure of some control by temperature change required precision, in addition, to current equipment, because between liquid medicine and the middle heat-conducting component, and the heat-conducting component contact each other is not inseparable enough to make the temperature heat dissipation inhomogeneous, and the radiating efficiency is low, influence the refrigeration effect greatly, and when the ageing must be changed of inner structure, dismounting device is comparatively loaded down with trivial details.
Disclosure of Invention
In order to solve the technical problem, the invention provides a semiconductor refrigeration temperature control device, which comprises fixing plates positioned at two sides of a liquid medicine cavity, wherein a first heat exchange plate is arranged at the center of each fixing plate, one surface of each first heat exchange plate is positioned in the liquid medicine cavity, the other surface of each first heat exchange plate is connected with a semiconductor refrigeration piece, and a second heat exchange plate is arranged outside each semiconductor refrigeration piece; and fast-assembly pressure mechanisms are arranged on the periphery of the fixed plates and are used for compressing the two fixed plates.
Preferably, the first heat exchange plate comprises a first plate body, and a PFA film is attached to one surface of the liquid medicine cavity of the first plate body.
Preferably, the second heat exchange plate comprises two groups of second plate bodies, and cold water pipes arranged in an S shape are arranged between the second plate bodies.
Preferably, the fast-assembling pressure mechanism comprises a plurality of connecting nails, the end parts of the adjacent connecting nails are connected through a connecting rod, the head part of the connecting nail is provided with an annular first pressure bag, and the first pressure bag is connected with a cold water pump of a refrigeration system; the other end of the connecting nail is provided with a second pressure bag, the second pressure bag is provided with an internal threaded sheet, the internal threaded sheet is screwed on the screw rod, and the second pressure bag is positioned between the internal threaded sheet and the fixing plate.
Preferably, the first pressure bag and the second pressure bag are made of rubber, the rubber is coated with polyurea on the outer portion, the first pressure bag is connected with the second pressure bag through a connecting pipe, and the second pressure bag is connected with the first pressure bag through a connecting pipe.
Preferably, the connecting rod is connected with the end part of the connecting nail in a coating mode through spraying polyurea.
Preferably, a supporting metal plate is arranged between the fixing plates.
Preferably, the lower part of the fixing plate is fixed with a mounting plate through a connecting piece.
Preferably, heat-conducting silica gel is filled in gaps between the first heat exchange plate and the semiconductor refrigeration plate and between the second heat exchange plate and the semiconductor refrigeration plate.
The semiconductor refrigeration temperature control device provided by the invention has the following beneficial effects: this semiconductor refrigeration temperature control device has two-way control by temperature change function, and the temperature control precision can be controlled at the within range of the 0.1 ℃ of required temperature, has better application in some temperature requirement higher processes, in addition, in order to guarantee the radiating effect, compresses tightly two fixed plates through continuous, can reduce the compactness between each heat transfer board and the semiconductor refrigeration piece, guarantees the cooling effect, and prevents to conduct heat and closely influence the detection temperature.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below.
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a side schematic view of the present invention;
FIG. 3 is a cross-sectional view of the present invention;
FIG. 4 is a schematic view of the quick load pressure mechanism of the present invention;
wherein, 1, fixing the plate; 2. a first heat exchange panel; 3. a semiconductor refrigeration sheet; 4. a second heat exchange panel; 5. quickly installing a pressure mechanism; 6. a liquid medicine cavity; 7. a PFA film; 8. a cold water pipe; 9. a connecting nail; 10. a connecting rod; 11. a first pressure bladder; 12. a second pressure bladder; 13. an internal thread piece; 14. a polyurea; 15. mounting a plate; 16. supporting the metal plate; 17. a liquid medicine inlet; 18. a liquid medicine outlet; 19. and (4) connecting the pipes.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
As shown in fig. 1 and 2, the invention provides a semiconductor refrigeration temperature control device, which comprises fixing plates 1 positioned at two sides of a liquid medicine cavity 6, wherein a first heat exchange plate 2 is arranged at the center of the fixing plate 1, one surface of the first heat exchange plate 2 is positioned in the liquid medicine cavity 6, a liquid medicine inlet 17 and a liquid medicine outlet 18 are connected to the liquid medicine cavity 6, the first heat exchange plate 2 comprises a first plate body, the first plate body is positioned at one surface of the liquid medicine cavity 6 and is pasted with a PFA film 7, the PFA film is a hot-melt extrusion casting film made of PFA resin, the PFA resin is a copolymer of perfluoropropyl perfluorovinyl ether and polytetrafluoroethylene, the PFA film 7 can effectively prevent the liquid medicine from corroding the first plate body, the first plate body can be austenitic stainless steel, titanium and titanium alloy, nickel and nickel alloy, and the like, the other surface is connected with a semiconductor refrigeration sheet 3, the working principle of the semiconductor refrigeration sheet 3 is based on the peltier principle, namely, when a circuit composed of two different conductors A and B is electrified with direct current, the joint can release other heat besides joule heat, the other joint absorbs heat, the phenomenon caused by the Peltier effect is reversible, and the joints which release and absorb heat are changed when the current direction is changed, so that bidirectional temperature change can be realized, as shown in figure 3, a second heat exchange plate 4 is arranged outside the semiconductor refrigeration plate 3, the second heat exchange plate 4 comprises two groups of second plate bodies, a cold water pipe 8 which is arranged in an S shape is arranged between the second plate bodies, one side of the semiconductor refrigeration plate 3 close to the first plate body is refrigerated, one side close to the second plate body is used for generating heat, after cold water is introduced into the second plate body, the second plate body takes away a large amount of heat generated by the semiconductor refrigeration plate 3, so that the liquid medicine between the first plate bodies is rapidly cooled, after a certain temperature is reached, the current direction is adjusted to heat the original refrigerating surface and heat the refrigerating surface to balance the cooling effect, so that the temperature control precision is realized, and the temperature can be basically controlled to be within +/-0.1 ℃; and in order to guarantee the compactness between each plate body, just can increase the effect and the homogeneity of temperature transmission between each plate body, at first, the clearance intussuseption between first heat exchange plate 2 and second heat exchange plate 4 and the semiconductor refrigeration piece 3 is filled with heat conduction silica gel, with the clearance packing between first heat exchange plate 2 and the second exchange heat exchange plate 4, guarantees to contact closely, and in order to further guarantee sufficient compactness to can quick assembly disassembly, fixed plate 1 is equipped with fast-assembling pressure mechanism 5 all around, fast-assembling pressure mechanism 5 is used for compressing tightly two fixed plate 1.
Specifically, as shown in fig. 4, the quick-assembly pressure mechanism 5 includes a plurality of connecting nails 9, the end portions of the adjacent connecting nails 9 are connected through a connecting rod 10, the head portions of the connecting nails 9 are provided with annular first pressure bags 11, and the first pressure bags 11 are connected with a cold water pump of a refrigeration system; the other end of the connecting nail 9 is provided with a second pressure bag 12, the second pressure bag 12 is provided with an internal thread sheet 13, the internal thread sheet 13 is screwed on the screw rod, and the second pressure bag 12 is positioned between the internal thread sheet 13 and the fixing plate 1. The connecting nails 9 are connected through connecting rods 10, inserted into one side of the fixing plate 1 and penetrate through another fixing plate 1, a row of design can be assembled simultaneously, efficiency is improved, the other end of each connecting nail is locked on the corresponding connecting nail 9 through a threaded sheet, the first pressure bag 11 and the second pressure bag 12 are made of rubber, polyurea 14 is coated on the outer portion of the rubber, the first pressure bags 11 are connected through connecting pipes 19, the second pressure bags 12 are connected through connecting pipes 19, cold water is continuously conveyed to the second heat exchange plate 4 through a cold water system, a shunt pipe can be arranged to be connected to the second pressure bags 12 and the first pressure bags 11 and filled with the cold water, at the moment, the two pressure bags can continuously extrude the fixing plate 1, tightness between the fixing plates 1 is guaranteed, and tightness of each plate body inside is guaranteed. The polyurea 14 has good toughness, can provide a good coating effect on rubber, can increase strength, and can prevent damage to the outside of the pressure bladder after long-term use, and the polyurea 14 can prevent problems such as water leakage after aging of rubber.
Be equipped with between the fixed plate 1 and support the panel beating 16, fixed plate 1 lower part is fixed with mounting panel 15 through the connecting piece, can be convenient for install whole device on equipment, and it is convenient to implement.