GB2476315A - Cleaning a stack of thin wafers - Google Patents
Cleaning a stack of thin wafers Download PDFInfo
- Publication number
- GB2476315A GB2476315A GB0922363A GB0922363A GB2476315A GB 2476315 A GB2476315 A GB 2476315A GB 0922363 A GB0922363 A GB 0922363A GB 0922363 A GB0922363 A GB 0922363A GB 2476315 A GB2476315 A GB 2476315A
- Authority
- GB
- United Kingdom
- Prior art keywords
- wafers
- trough
- liquid
- jets
- stack
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 235000012431 wafers Nutrition 0.000 title claims abstract description 142
- 238000004140 cleaning Methods 0.000 title claims abstract description 34
- 239000007788 liquid Substances 0.000 claims abstract description 44
- 230000009471 action Effects 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims description 17
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 230000008569 process Effects 0.000 description 9
- 238000005520 cutting process Methods 0.000 description 7
- 239000002002 slurry Substances 0.000 description 5
- 230000007547 defect Effects 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 238000003892 spreading Methods 0.000 description 3
- 230000007480 spreading Effects 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 239000012790 adhesive layer Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67017—Apparatus for fluid treatment
- H01L21/67028—Apparatus for fluid treatment for cleaning followed by drying, rinsing, stripping, blasting or the like
- H01L21/6704—Apparatus for fluid treatment for cleaning followed by drying, rinsing, stripping, blasting or the like for wet cleaning or washing
- H01L21/67051—Apparatus for fluid treatment for cleaning followed by drying, rinsing, stripping, blasting or the like for wet cleaning or washing using mainly spraying means, e.g. nozzles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/02—Cleaning by the force of jets or sprays
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/02041—Cleaning
- H01L21/02043—Cleaning before device manufacture, i.e. Begin-Of-Line process
- H01L21/02052—Wet cleaning only
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67017—Apparatus for fluid treatment
- H01L21/67028—Apparatus for fluid treatment for cleaning followed by drying, rinsing, stripping, blasting or the like
- H01L21/6704—Apparatus for fluid treatment for cleaning followed by drying, rinsing, stripping, blasting or the like for wet cleaning or washing
- H01L21/67057—Apparatus for fluid treatment for cleaning followed by drying, rinsing, stripping, blasting or the like for wet cleaning or washing with the semiconductor substrates being dipped in baths or vessels
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Cleaning Or Drying Semiconductors (AREA)
Abstract
Apparatus for cleaning wafers in a stack comprising a multiplicity of wafers (Fig. 1; 10) comprises a horizontal trough 17 into which the stack of wafers is to be placed, the axis of the trough being perpendicular to the planes of the individual wafers; supports 12 within the trough to hold the wafers off lower parts of the trough, a fixed support 14 for one end of the stack; and sufficient space in a direction away from this end of the stack to allow the wafers to separate by a distance such that capillary action between them is broken. Jets of liquid are introduced upwardly from lower parts of the trough, whereby the jets of liquid maintain the wafers clear of direct contact with the supports 12 holding the wafers off the lower parts of the tough and separate the wafers laterally in a direction parallel to the axis of the trough by moving the wafers in a direction away from the fixed support, and whereby the jets of liquid also clean the wafers.
Description
CLEANING STACK OF WAFERS
Field of the Invention
The invention relates to an apparatus and a method for use in the process of solar cell manufacturing, and is particularly concerned with cleaning a multiplicity of thin wafers arranged in a stack.
Background of the Invention
Thin wafers of silicon for photovoltaic panels are produced by slicing a silicon block into a multiplicity of wafers. These may be between 5Ojinland 300)nnthick.
Thin wafers are desirable to reduce material requirements and manufacturing costs, but such wafers are fragile. Before cutting, an adhesive layer is spread on one surface of the block to bold the wafers in place during cutting. The action of cutting is effected with an array of fast moving wires. During cutting the block is cooled and the debris material from cutting is removed in a liquid or slurry. The slurry and debris remain on the surface of the wafers after cutting, and so cleaning of the wafers is essential. The presence of slurry and water on the wafers rësdlts in some capillary action, which tends to hold adjacent wafers together. Cleaning is necessary to remove the slurry, any remains of the adhesive layer, and related chemicals.
It is known to clean wafers individually. The wafers are arranged in a horizontal line, and a significant length of equipment is necessary (e.g. Sm -1 5m) to carry out the cleaning process. One of the main disadvantages of single wafer cleaning is that the wafers may be damaged on the rollers or moving pins which carry the wafers through the cleaning process. W02009129989A1 and EP2060659A2 describe such cleaning systems. Any misalignment of the rollers or pins which support and move the wafers through the equipment may lead to wastage through the creation of defects in the wafers.
To avoid the problems associated with single wafer cleaning, it has been proposed to carry the wafers through the cleaning process in a basket or cassette with a 4mm -10mm gap between the wafers. W02009098042A1 shows an embodiment of such a solution. US6,001,191 shows a similar basket cleaning method. However, this method needs more than one tank for washing and rinsing, and again results in equipment of significant length, as with the single wafer concept described above.
Wafers have been fixed in fixed comb arrangements for spraying. US20040262245 shows an example of such a cleaning method.
Summary of the Invention
The invention provides apparatus for cleaning wafers in a stack comprising a multiplicity of wafers, and comprising a generally horizontal trough into which the S stack of wafers is to be placed, the axis of the trough being perpendicular to the planes of the individual wafers, supports within the trough to hold the wafers off lower parts of the trough, a fixed support for one end of the stack and sufficient space in a direction away from this end of the stack to allow the wafers to separate by a distance such that capillary action between them is broken, in which there is provision to introduce jets of liquid upwardly from lower parts of the trough, whereby those jets of liquid maintain the wafers clear of direct contact with the supports to hold the wafers off the lower parts of the tough, and separate the wafers laterally in a direction parallel to the axis of the trough so moving the wafers in a direction away from the fixed support, and those jets of liquid also clean the wafers.
It is preferred that there is a movable support for the other end of the stack, the movable support being free to move a limited distance in a direction perpendicular to the planes of the individual wafers to allow the wafers to separate such that capillary action between them is broken.
In this form it is further preferred that there is provision to move the moveable support back towards the fixed support, so that when the pressure from the jets of liquid has been reduced, but before the wafers settle back onto the supports to hold the wafers off the lower parts of the trough, the wafers can be pushed back to their original positions on the axis of the trough.
Advantageously there is a regulating valve by which the volume of liquid fed to the liquid feed supply can be controlled, so to regulate the pressure in the jets of liquid to hold the wafers off the supports which hold the wafers off the lower parts of the trough.
Conveniently the provision to introduce jets of liquid is formed of closed chambers with a liquid feed supply and small holes to form the jets directed towards the interior of the trough.
It is preferred that the supports within the trough to hold the wafers off the lower parts of the trough are rods of sufficient rigidity to hold the wafers in position.
It is also preferred that the end supports and supports to hold the wafers off the lower parts of the trough are formed as a magazine, which is separate from the provision for jets of liquid.
The invention includes a method of cleaning wafers in a stack comprising a multiplicity of wafers, including the step of supporting the wafers in vertical planes, supplying jets of liquid from beneath the wafers, the jets being of sufficient strength to lift the wafers off the supports, allowing the wafers to spread horizontally, so that the jets of liquid can clean the faces of the wafers, and then, when the wafers have been cleaned, urging the wafers together for removal from the supports.
The invention also includes wafers when cleaned in the apparatus of the invention as described above, or by the method of the invention as described above.
ef description of the Drawings
A specific embodiment of the invention will now be described by way of example with reference to the accompanying drawings in which:-Fig 1 is a side view of a stack of wafers supported in a magazine; Fig 2 is an end view of that stack, showing nozzle chambers beneath the wafers; Fig 3 is a side view of the arrangement showing the extent of the nozzle chambers; Fig 4 is an end view showing the stack holder and wafers after the spray has started so that the wafers have been lifted off the supports in the magazine; Fig 5 is a corresponding side view showing the wafers spreading out to the right; Fig 6 is an end view showing cleaning liquid escaping between the stack and the nozzle chambers; and Fig 7 shows the wafers uniformly scattered along the full length of the magazine.
Detailed description of the Drawings
Fig 1 shows a stack of wafers 10 supported in a magazine generally indicated as 11.
As shown for this specific embodiment, the wafers are square, and are arranged so that their diagonals run horizontally and vertically. However, the wafers may have other shapes, and the magazines for those wafers will have appropriate configurations. The magazine comprises support rods 12, fixedly connected to an end support 14. At the end of the support rods 12 away from the fixed end support 14 there is a movable end support 15. The movable end support is arranged to move away from the fixed end support 14 in a direction perpendicular to the planes of the wafers in the stack 10.
Initially, in this example, individual wafers in the stack 10 are spaced apart by the thickness of cutting wires used earlier in the process. However, the gaps between the wafers may be smaller. During the wire sawing process (preceding cleaning) the wafers were held in place by an adhesive coating on one surface of the block that was sawn to form the wafers. The gaps between the wafers are filled with slurry and water which result in capillary forces which tend to hold adjacent wafers together.
In the end view shown in Fig 2, there are nozzle chambers 16 over which the lower two sides of the stack 10 can be positioned (when the magazine is in position for the stack to be cleaned). These nozzle chambers are arranged to form the sides of a generally horizontal V' shaped trough 17, within which the pairs of rods 12 on either side of the trough 17 support the stack of wafers 10 just clear of the spray surfaces of that trough. It is not necessary for the nozzle chambers to underlie all of the lower sides of the wafers.
In Fig 2 there is a diagrammatic representation of liquid feed pipes 18 to feed cleaning liquid to the nozzle chambers 16. A collection channel (not shown) is arranged below the nozzle chambers 16 to collect liquid after spraying to clean the wafers. The magazine, trough and collection channel can be contained in a tank with a total volume of 1 cubic metre.
This Fig 2 shows the initial configuration of the magazine 11 within the V' shaped trough formed by the nozzle chambers 16.
Fig 3 shows the magazine 11 and the stack of wafers 10 with the rods 12 holding the stack of wafers off the nozzle chambers 16. This is the situation when the magazine has been positioned within the trough 17, but before the supply of cleaning liquid is switched on.
In Figures 4 and 5, the supply of cleaning liquid under pressure has been switched on, and cleaning liquid is being sprayed upwardly and inwardly through the nozzle chambers 16. High pressure liquid from the nozzles causes the wafers to float within the tank. Fig 4 shows the passage of the cleaning liquid (grey arrows 21) and the consequent lifting of the stack of wafers off the rods 12 (black arrow 22).
As may be seen from Fig 5, pressurized spray from the nozzle chambers 16 also moves the wafers to the right (small black arrows 23 A), so breaking the capillary attraction between wafers and spreading the wafers apart. This moves the wafers at the outer end of the stack towards the moveable support 15. As the wafers spread, the movable support 15 moves slowly to the right (small black arrow 23B).
Spreading of the wafers allows space between them, so that the cleaning liquid has easy access to effect a thorough cleaning action.
Figures 6 and 7 show the final position of the wafers, which are disposed uniformly along the entire length of the magazine. Cleaning liquid can now escape between the stack 10 and the nozzle chambers 16. The movable support 15 has now reached its limit of movement. The wafers can no longer spread out in a horizontal direction. In this condition forces in a vertical direction reach a balance, with pressure, buoyancy, gravity and drag forces in equilibrium Pressure of the cleaning liquid is then reduced, but is still sufficient to hold the wafers clear of the rods 12. In this state the stack is compressed by leftward movement of the movable end support 15.
Primary cleaning and then a separate rinsing process can be carried out with the stack held in the same magazine, and the liquids being applied in the same tank. All wafers are washed simultaneously. During the cleaning process the wafers have no contact with the rods 12, as the wafers float' within the tank. Depending on the amount of contamination, wafer thickness, size and liquid consumption, the float height is adjustable by regulating the liquid pressure.
In the example illustrated in the drawings, the magazine 11 is separate from the nozzle chambers 16. This is one preferred form, but alternatively the nozzle chambers may be linked to the rods 12, so that the magazine and nozzle chambers can be moved together from tank to tank. The example shown in the drawings is believed to be the preferred form. This makes it possible to have just one washing station with fixed nozzle chambers, so that several magazines loaded with stacks of wafers can be moved through that station in sequence.
Specific dimensions applicable to one particular process (and without limitation) are described below.
The size of the nozzles should be small (e.g. <1mm) to prevent damage to the wafers. The distance between nozzles could be 2-20mm. The length of the drilled plate (in which the nozzles are formed) could be 10-2000mm and with a width of 20-2000mm. A typical arrangement for one stack of 700 wafers, each waferbeing 1 56x1 56x0. 18mm, could have nozzle chambers of 180mm, with hole diameters of 0.8mm. spaced from adjacent holes by 5mm. In this case the movable support could travel through a distance of around 40mm.
Advantages of the Inventis Because there is no direct contact between the wafers and the rods during cleaning, the nozzles will inject narrow streams of liquid between the wafers. These streams cannot significantly distort the edges of the wafers, and consequently there will be thorough cleaning with reduced wafer edge defects.
While it is difficult to assess the influence of various effects from upstream processes, the reduction in defects arising from the washing process of the invention can be assessed broadly. For instance, with a wafer thickness of 180 ft, it has been found that there is an 0.8% crack and breakage level with basket and horizontal line cleaning, but only 0.2% with the present invention.
Claims (1)
- CLAIMS1/ Apparatus for cleaning wafers in a stack comprising a multiplicity of wafers, and comprising a generally horizontal trough into which the stack of wafers is to be placed, the axis of the trough being perpendicular to the planes of the individual wafers, supports within the trough to hold the wafers off lower parts of the trough, a fixed support for one end of the stack and sufficient space in a direction away from this end of the stack to allow the wafers to separate by a distance such that capillary action between them is broken, in which there is provision to introduce jets of liquid upwardly from lower parts of the trough, whereby those jets of liquid maintain the wafers clear of direct contact with the supports to hold the wafers off the lower parts of the tough, and separate the wafers laterally in a direction parallel to the axis of the trough so moving the wafers in a direction away from the fixed support, and those jets of liquid also clean the wafers.2/ Apparatus as claimed in claim 1, in which there is a movable support for the other end of the stack, the movable support being free to move a limited distance in a direction perpendicular to the planes of the individual wafers to allow the wafers to separate such that capillary action between them is broken.3/ Apparatus as claimed in claim 2, in which there is provision to move the moveable support back towards the fixed support, so that when the pressure from the jets of liquid has been reduced, but before the wafers settle back onto the supports to hold the wafers off the lower parts of the trough, the wafers can be pushed back to their original positions on the axis of the trough.4/ Apparatus as claimed in any one of the preceding claims, in which there is a regulating valve by which the volume of liquid fed to the liquid feed supply can be controlled, so to regulate the pressure in the jets of liquid to hold the wafers off the supports which hold the wafers off the lower parts of the trough.5/ Apparatus as claimed in any one of the preceding claims, in which the provision to introduce jets of liquid is formed of closed chambers with a liquid feed supply and small holes to form the jets directed towards the interior of the trough.6/ Apparatus as claimed in any one of the preceding claims, in which the supports within the trough to hold the wafers off the lower parts of the trough are rods of sufficient rigidity to hold the wafers in position.7/ Apparatus as claimed in any one of the preceding claims, in which the end supports and supports to hold the wafers off the lower parts of the trough are formed as a magazine, which is separate from the provision for jets of liquid.8/ Method of cleaning wafers in a stack comprising a multiplicity of wafers, including the step of supporting the wafers in vertical planes, supplying jets of liquid from beneath the wafers, the jets being of sufficient strength to lift the wafers off the supports, allowing the wafers to spread horizontally, so that the jets of liquid can clean the faces of the wafers, and then, when the wafers have been cleaned, urging the wafers together for removal from the supports.9/ Wafers when cleaned in the apparatus of Claims I to 7, or by the method of Claim 8.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0922363A GB2476315A (en) | 2009-12-21 | 2009-12-21 | Cleaning a stack of thin wafers |
PCT/NO2010/000473 WO2011078686A1 (en) | 2009-12-21 | 2010-12-20 | Cleaning stack of wafers |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0922363A GB2476315A (en) | 2009-12-21 | 2009-12-21 | Cleaning a stack of thin wafers |
Publications (2)
Publication Number | Publication Date |
---|---|
GB0922363D0 GB0922363D0 (en) | 2010-02-03 |
GB2476315A true GB2476315A (en) | 2011-06-22 |
Family
ID=41717354
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB0922363A Withdrawn GB2476315A (en) | 2009-12-21 | 2009-12-21 | Cleaning a stack of thin wafers |
Country Status (2)
Country | Link |
---|---|
GB (1) | GB2476315A (en) |
WO (1) | WO2011078686A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102319689A (en) * | 2011-08-18 | 2012-01-18 | 浚鑫科技股份有限公司 | Cleaning device |
EP2703001A1 (en) | 2012-08-26 | 2014-03-05 | XAX Kft. | Tumor vaccination |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002110591A (en) * | 2000-09-27 | 2002-04-12 | Takata Corp | Apparatus and method of cleaning wafers after wire saw |
US20030084921A1 (en) * | 1995-07-10 | 2003-05-08 | Lg Semicon Co., Ltd. | Semiconductor wafer cleaning apparatus and method |
US20080295860A1 (en) * | 2006-12-15 | 2008-12-04 | Norbert Burger | Apparatus and Method for Cleaning of Objects, in Particular of Thin Discs |
WO2009091264A2 (en) * | 2008-01-15 | 2009-07-23 | Rec Scanwafer As | Wafer stack cleaning |
RU2380305C2 (en) * | 2006-07-06 | 2010-01-27 | Рена Зондермашинен Гмбх | Device and method to separate and transfer substrates |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TW310452B (en) | 1995-12-07 | 1997-07-11 | Tokyo Electron Co Ltd | |
DE10215283B4 (en) | 2002-04-05 | 2004-06-03 | Astec Halbleitertechnologie Gmbh | Device for receiving substrates |
DE102007054093B3 (en) | 2007-11-13 | 2009-07-23 | Rena Sondermaschinen Gmbh | Apparatus and method for transporting flat goods in continuous systems |
WO2009098042A1 (en) | 2008-02-06 | 2009-08-13 | Meyer Burger Ag | Device for cleaning flat substrates |
DE102008022282A1 (en) | 2008-04-24 | 2009-10-29 | Gebr. Schmid Gmbh & Co. | Device and method for treating silicon wafers or flat objects |
-
2009
- 2009-12-21 GB GB0922363A patent/GB2476315A/en not_active Withdrawn
-
2010
- 2010-12-20 WO PCT/NO2010/000473 patent/WO2011078686A1/en active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20030084921A1 (en) * | 1995-07-10 | 2003-05-08 | Lg Semicon Co., Ltd. | Semiconductor wafer cleaning apparatus and method |
JP2002110591A (en) * | 2000-09-27 | 2002-04-12 | Takata Corp | Apparatus and method of cleaning wafers after wire saw |
RU2380305C2 (en) * | 2006-07-06 | 2010-01-27 | Рена Зондермашинен Гмбх | Device and method to separate and transfer substrates |
US20080295860A1 (en) * | 2006-12-15 | 2008-12-04 | Norbert Burger | Apparatus and Method for Cleaning of Objects, in Particular of Thin Discs |
WO2009091264A2 (en) * | 2008-01-15 | 2009-07-23 | Rec Scanwafer As | Wafer stack cleaning |
Also Published As
Publication number | Publication date |
---|---|
WO2011078686A1 (en) | 2011-06-30 |
GB0922363D0 (en) | 2010-02-03 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
KR970005944B1 (en) | Apparatus & method of automatically separating stacked wafers | |
KR100931551B1 (en) | Wafer Demount Method, Wafer Demount Device and Wafer Demount Conveyor | |
KR101118394B1 (en) | Washing apparatus for plate material | |
KR101536722B1 (en) | Method for treating substrate | |
TWI632957B (en) | Apparatus for rinsing and drying substrate | |
KR20200034579A (en) | Substrate treating apparatus and substrate treating method | |
US10699918B2 (en) | Chemical supply unit and apparatus for treating a substrate | |
CN110202707B (en) | Multi-wire cutting device and cutting fluid supply assembly thereof | |
CN111463153A (en) | Silicon wafer cleaning device and control method thereof | |
KR20120086873A (en) | Apparatus and method for removing wafer from ingot | |
GB2476315A (en) | Cleaning a stack of thin wafers | |
KR102435925B1 (en) | As Sliced Cleaning process automation apparatus | |
KR20120110271A (en) | Apparatus for cleaning single wafer | |
KR102088632B1 (en) | Cleaning method and cleaning device | |
US20110168212A1 (en) | Wafer stack cleaning | |
EP2711978A1 (en) | Method of making wafers | |
JP2006148144A (en) | Cleaning apparatus for plate and draining apparatus thereof | |
JP4620573B2 (en) | Board cleaning equipment and high-pressure liquid spray cleaning equipment | |
CN102435058A (en) | Drying equipment, photoresist removing equipment and drying method | |
KR20160139883A (en) | Apparatus for cleaning semiconductor packages | |
TW201133594A (en) | Cleaning stack of wafers | |
KR100864262B1 (en) | Apparatus of Cleaning a Wafer | |
WO2009098042A1 (en) | Device for cleaning flat substrates | |
KR100936191B1 (en) | Ingot cleaning apparatus and ingot cleaning method | |
WO2010062918A2 (en) | Confinement of foam delivered by a proximity head |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |