WO2010070733A1 - 液晶アレイ検査装置システムの真空引き方法、液晶アレイ検査装置システム、および液晶アレイ検査装置 - Google Patents
液晶アレイ検査装置システムの真空引き方法、液晶アレイ検査装置システム、および液晶アレイ検査装置 Download PDFInfo
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- WO2010070733A1 WO2010070733A1 PCT/JP2008/072854 JP2008072854W WO2010070733A1 WO 2010070733 A1 WO2010070733 A1 WO 2010070733A1 JP 2008072854 W JP2008072854 W JP 2008072854W WO 2010070733 A1 WO2010070733 A1 WO 2010070733A1
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- liquid crystal
- crystal array
- inspection
- time
- array inspection
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/2851—Testing of integrated circuits [IC]
- G01R31/2855—Environmental, reliability or burn-in testing
- G01R31/286—External aspects, e.g. related to chambers, contacting devices or handlers
- G01R31/2865—Holding devices, e.g. chucks; Handlers or transport devices
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
Definitions
- the present invention relates to an array inspection of a liquid crystal substrate, and relates to an inspection apparatus and an inspection method for performing a liquid crystal array inspection in a vacuum state.
- a liquid crystal array inspection apparatus there is known an apparatus that includes an inspection room and a load lock chamber through which a liquid crystal substrate is led into and out of the inspection room, and performs an array inspection of the liquid crystal substrate in a vacuum inspection room.
- an inspection signal is applied to an array of liquid crystal substrates to be inspected, a charged particle beam such as an electron beam or an ion beam is scanned two-dimensionally on the substrate, and a scanned image obtained by beam scanning is obtained. Based on the board inspection.
- an inspection is performed to check whether the manufactured TFT array substrate is driven correctly.
- an electron beam is used as a charged particle beam, and the TFT A scan image is acquired by scanning the array substrate, and an inspection is performed based on the scan image.
- the liquid crystal array inspection apparatus includes a load lock chamber as well as an inspection room.
- An uninspected liquid crystal substrate is introduced from the atmosphere side into the inspection room through the load lock chamber, and the inspected liquid crystal substrate is moved from the inspection room to the atmosphere side.
- the liquid crystal substrate is led in and out from the atmosphere side, and on the other hand, the liquid crystal substrate is led in and out from the inspection room.
- a gate is provided between the inspection chamber and the load lock chamber and between the load lock chamber and the atmosphere side in order to lead the liquid crystal substrate to and from the atmosphere side while maintaining the vacuum state in the inspection chamber. ing.
- the load lock chamber is evacuated by evacuating the load lock chamber with a vacuum pump while both gates are closed.
- a vacuum degree lower than that required for the examination room may be used. Therefore, a vacuum pump having a relatively low degree of vacuum called a roughing pump is usually used.
- a configuration using a plurality of liquid crystal array inspection devices can be considered as one configuration for increasing the inspection efficiency.
- FIG. 11 shows a configuration example including two liquid crystal array inspection apparatuses. Although FIG. 11 shows a configuration including two liquid crystal array inspection apparatuses, the configuration is not limited to two and may be three or more.
- Each of the liquid crystal array inspection apparatuses 12A and 12B includes load lock chambers 15A and 15B, respectively.
- a configuration for evacuating each of the load lock chambers 15A and 15B a configuration in which a load lock roughing vacuum pump 17 is connected to each of the load lock chambers 15A and 15B, and each of the load lock chambers 15A and 15B is evacuated individually. Conceivable. In this configuration, the same number of load lock roughing vacuum pumps as the number of liquid crystal array inspection apparatuses are required, which causes an increase in cost and space.
- FIG. 11 shows a configuration in which the load pump chamber roughing vacuum pump 17 is shared, and one of the load lock chambers 15 ⁇ / b> A and 15 ⁇ / b> B is evacuated by switching the connection state by the connection switching device 16.
- the load lock roughing is used for the load lock chamber that has been requested to perform the vacuuming earlier in time.
- a vacuum pump 17 is connected to perform evacuation.
- the load of the two liquid crystal array inspection apparatuses that has started to start vacuuming is delayed.
- the lock chamber is in a standby state until the first evacuation of the load lock chamber is completed, and the evacuation is performed after the first evacuation of the load lock chamber is completed.
- FIG. 12 is a diagram for explaining the relationship between the inspection time when inspecting a liquid crystal substrate of a model with a short inspection time and a model with a long inspection time.
- the relationship between the inspection times can be divided into three cases depending on the relationship between the difference between the two inspection times (T1, T2) and the evacuation time Tv required for evacuation.
- 12 (a) to 12 (c) show the relationship between the evacuation time Tv and the difference
- between the two inspection times (T1, T2) when Tv
- the inspection time T1 is longer than the inspection time T2, and the liquid crystal array inspection apparatus at the inspection time T1 starts evacuation before the liquid crystal array inspection apparatus at the inspection time T2. Yes.
- the inspection time T2 ends after the inspection time T1 ends, and one of the liquid crystal array inspection devices that ended first is vacuumed. While evacuation is performed at the time interval of the pulling time Tv, the other liquid crystal array inspection apparatus is in a standby state with a time width of the waiting time Tw ( ⁇ Tv). For this reason, the liquid crystal array inspection apparatus having the inspection time T2 cannot advance the inspection ahead of the liquid crystal array inspection apparatus having a long inspection time T1 even though the inspection time is short.
- the inspection time T2 ends before the inspection time T1 ends, and evacuation is performed with the time width of the evacuation time Tv. Since the inspection can proceed to the next inspection after the inspection, the liquid crystal array inspection apparatus with a short inspection time of T2 can advance the inspection ahead of the liquid crystal array inspection apparatus with a long inspection time of T1. it can.
- the inspection time is T2.
- the inspection cycle of the short-type liquid crystal array inspection apparatus has a problem that the inspection cannot proceed ahead of the inspection cycle of the liquid crystal array inspection apparatus of the long-type inspection time T1.
- the present invention solves the above-mentioned conventional problems, and inspects liquid crystal substrate models with a short inspection time when vacuuming a plurality of liquid crystal array inspection apparatuses with a few load lock roughing vacuum pumps.
- the purpose is to eliminate the influence by inspecting the model of the liquid crystal substrate having a long time, and to allow the inspection cycle of the liquid crystal array inspection apparatus having a short inspection time to pass the inspection cycle of the liquid crystal array inspection apparatus having a long inspection time. .
- the liquid crystal array inspection device inspected by the liquid crystal array inspection device and inspected by the liquid crystal array inspection device in the inspection state at the same time. Compare the inspection time of the liquid crystal substrate model, compare the evacuation time required to evacuate the load lock chamber and the difference time of the inspection time of the liquid crystal array inspection device, and the evacuation time is less than the difference time.
- the inspection of the liquid crystal substrate model with a short inspection time has an effect on the inspection of the liquid crystal substrate model with a long inspection time. Accordingly, it is possible to overtake the inspection of the liquid crystal substrate model having a long inspection time and perform it first.
- Presence / absence of competing states in which vacuuming is performed at the same time, comparison of inspection times of competing liquid crystal array inspection apparatuses, and comparison of difference time between inspection times of liquid crystal array inspection apparatuses competing for vacuuming and determination Priority is given to evacuation of the load lock chamber included in the liquid crystal array inspection apparatus selected by this priority determination, and evacuation of the load lock chamber included in other liquid crystal array inspection apparatuses competing for evacuation is in a waiting state. To do.
- the present invention may be a plurality of aspects of a vacuum drawing method for a liquid crystal array inspection apparatus system, a liquid crystal array inspection apparatus system, and a liquid crystal array inspection apparatus.
- the liquid crystal array inspection device is a single inspection device that performs an array inspection of a liquid crystal substrate.
- the liquid crystal array inspection apparatus system has a system configuration including a plurality of liquid crystal array inspection apparatuses and one or a plurality of load lock roughing vacuum pumps, and a plurality of liquid crystal array inspection apparatuses can be inspected simultaneously. It can be done.
- the number of load lock roughing vacuum pumps is smaller than the number of liquid crystal array inspection devices, and each load lock roughing vacuum pump is a load lock chamber of any liquid crystal array inspection device. Connect to and vacuum.
- the present invention provides a load lock roughing vacuum pump by reducing the number of load lock roughing vacuum pumps less than the number of liquid crystal array inspection devices in the vacuuming of the loadlock chamber by the loadlock roughing vacuum pump. Suppresses the increase in cost and space.
- priority determination such as the presence or absence of a competing state in which evacuation is performed at the same time, comparison of inspection times of competing liquid crystal array inspection apparatuses, comparison with a difference time of inspection times of liquid crystal array inspection apparatuses competing with evacuation time
- the load lock chamber of the liquid crystal array inspection apparatus is preferentially evacuated so that the inspection cycle of the liquid crystal array inspection apparatus with a short inspection time is reduced. This makes it possible to pass the inspection cycle and shorten the entire inspection time of the liquid crystal array inspection apparatus.
- the aspect of the evacuation method of the liquid crystal array inspection apparatus system of the present invention comprises a plurality of units each including an inspection chamber for inspecting a liquid crystal substrate in a vacuum state and a load lock chamber for introducing and introducing the liquid crystal substrate into and from the inspection chamber.
- a liquid crystal array inspection apparatus system comprising a liquid crystal array inspection apparatus and a number of roughing vacuum pumps less than the number of liquid crystal array inspection apparatuses that evacuate each load lock chamber with a rough degree of vacuum, a roughing vacuum pump
- the liquid crystal array inspection device compares the inspection time of the liquid crystal array inspection device with the inspection time of the competing liquid crystal array inspection device, and sets the load lock chamber.
- a vacuum pump for roughing is connected to the load lock chamber of the liquid crystal array inspection apparatus with the shortest inspection time, giving priority to evacuation of the load lock chamber of the liquid crystal array inspection apparatus with the shortest inspection time. Wait for evacuation of the load lock chamber of the array inspection device.
- the liquid crystal array inspection apparatus system includes a connection switching device that switches a connection relationship between the load lock chamber and the roughing vacuum pump and allows each roughing vacuum pump to be switched to one of the load lock chambers.
- a connection switching device that switches a connection relationship between the load lock chamber and the roughing vacuum pump and allows each roughing vacuum pump to be switched to one of the load lock chambers.
- a roughing vacuum pump is connected to the load lock chamber of the liquid crystal array inspection device with the shortest inspection time. During give priority to the evacuation of the shortest load lock chamber of the liquid crystal array inspection device to wait for the evacuation of the load lock chamber of the liquid crystal array inspection apparatus for conflict.
- the vacuuming operation of the liquid crystal array inspection device is interrupted, After the evacuation of the priority liquid crystal array inspection apparatus is completed, the evacuation operation of the suspended liquid crystal array inspection apparatus is resumed.
- an aspect of the liquid crystal array inspection apparatus system of the present invention includes a plurality of liquid crystal array inspection apparatuses each having an inspection chamber for inspecting a liquid crystal substrate in a vacuum state and a load lock chamber for introducing and introducing the liquid crystal substrate into the inspection room.
- the number of roughing vacuum pumps is less than the number of liquid crystal array inspection devices that evacuate each load lock chamber with a rough vacuum, and the connection relationship between the load lock chamber and the roughing vacuum pump is switched. And a connection switching device that allows the roughing vacuum pump to be switched to one of the load lock chambers.
- each liquid crystal array inspection device that constitutes the liquid crystal array inspection device system compares the inspection time of the competing liquid crystal array inspection device and sets the load lock chamber. Compare the evacuation time required for evacuation with the difference time between the inspection times of both competing liquid crystal array inspection devices. When the evacuation time is less than the difference time, control the switching of the connection switching device to inspect the inspection time. Connecting a roughing vacuum pump to the load lock chamber of the LCD array inspection device with the shortest time, giving priority to evacuation of the load lock chamber of the liquid crystal array inspection device with the shortest inspection time. Wait for vacuuming of the lock chamber.
- each liquid crystal array inspection apparatus is connected via a network, and acquires the inspection time of the competing liquid crystal array inspection apparatus and driving information for vacuuming via the network.
- the inspection time of each liquid crystal array inspection apparatus used for priority determination and the drive information such as whether the load lock chamber of each liquid crystal array inspection apparatus is in operation or scheduled to be evacuated are connected to each other via a network. It can be shared between the liquid crystal array inspection apparatuses, and can be taken in at the time of priority determination.
- Each liquid crystal array inspection apparatus compares the acquired inspection time with the inspection time of the liquid crystal array inspection apparatus, determines a competitive state based on the acquired vacuuming drive information, and performs priority determination.
- a liquid crystal array inspection apparatus is a liquid crystal array inspection apparatus including an inspection chamber for inspecting a liquid crystal substrate in a vacuum state and a load lock chamber for introducing and introducing the liquid crystal substrate into the inspection chamber.
- the lock chamber can be switched to either one of the vacuum pumps for roughing, which is less than the number of liquid crystal array inspection devices that evacuate with a rough vacuum, and one of the load lock chambers of other liquid crystal array inspection devices.
- the inspection time of the competing liquid crystal array inspection device is compared, and the evacuation time required for evacuating the loadlock chamber and the competing liquid crystal array inspection devices
- the vacuuming time is less than or equal to the difference time
- roughing is performed in the load lock chamber of the liquid crystal array inspection device with the shortest inspection time.
- liquid crystal substrate models with a short inspection time are tested.
- the inspection cycle of the liquid crystal array inspection apparatus with a short inspection time can pass the inspection cycle of the liquid crystal array inspection apparatus with a long inspection time.
- FIG. 10 is a diagram for explaining a priority operation in the case of Tv ⁇
- SYMBOLS 1 Liquid crystal array inspection apparatus system
- 2 Liquid crystal array inspection apparatus, 3 ... Control circuit part, 3a ... Control part, 3b ... Inspection control part, 3c ... Load lock control part, 3d ... Connection control part, 3e ... Memory
- FIG. 1 and 2 are diagrams for explaining a schematic configuration of the liquid crystal array inspection apparatus system 1 of the present invention.
- FIG. 1 shows a configuration example in which a plurality of liquid crystal array inspection apparatuses are evacuated by a single load lock roughing vacuum pump
- FIG. 2 shows that the plurality of liquid crystal array inspection apparatuses are more than the number of liquid crystal array inspection apparatuses.
- a configuration example is shown in which evacuation is performed with a small number of load pump roughing vacuum pumps.
- FIG. 2 shows an example of two load lock roughing vacuum pumps.
- a liquid crystal array inspection apparatus system 1 of the present invention includes a plurality of liquid crystal array inspection apparatuses 2 (2A, 2B,..., 2N), a single load lock roughing vacuum pump 7, A connection switching device 6 (6A, 6B,..., 6N) that connects the load lock roughing vacuum pump 7 and each liquid crystal array inspection device 2 (2A, 2B,..., 2N) in a switchable manner is provided.
- the liquid crystal array inspection apparatus system 1 of the present invention includes a plurality of liquid crystal array inspection apparatuses 2 (2A, 2B,..., 2N) and a number smaller than the number of liquid crystal array inspection apparatuses 2. Between the load lock roughing vacuum pump 7 (7A, 7B) and the load lock roughing vacuum pump 7 (7A, 7B) and each liquid crystal array inspection apparatus 2 (2A, 2B,..., 2N). A connection switching device 6 (6A, 6B,..., 6N) that can be switched is provided.
- Each liquid crystal array inspection apparatus 2 includes an inspection chamber 4 that performs an array inspection of a liquid crystal substrate, a load lock chamber 5 that introduces and leads a liquid crystal substrate between the inspection chamber 4 and the atmosphere side, and controls the inspection operation.
- a control circuit unit 3 having a configuration for preferentially processing the evacuation of the load lock chamber is provided.
- the inspection room 4, the load lock chamber 5, and the control unit for controlling the inspection operation can be the same as the configuration provided in the normal liquid crystal array inspection apparatus, detailed description thereof is omitted here.
- control circuit sections 3 of the plurality of liquid crystal array inspection apparatuses 2 (2A, 2B,..., 2N) are connected by a network 8 and share data held by the liquid crystal array inspection apparatuses 2.
- Each of the liquid crystal array inspection apparatuses 2 (2A, 2B,..., 2N) opens the gate in each load lock chamber 5 (5A, 5B,..., 5N) when performing an array inspection of the liquid crystal substrate.
- the load lock chamber 5 (5A, 5B,..., 5N) is evacuated by the load lock roughing vacuum pump 7 to load the load lock chamber 5 (5A, 5B,..., 5N) is evacuated.
- the liquid crystal substrate introduced into the load lock chamber 5 (5A, 5B,..., 5N) and the inspection chamber 4 (4A, 4B,..., 4N) corresponding to the load lock chamber 5 (5A, 5B,. Are opened and introduced into the examination room 4 (4A, 4B,..., 4N).
- the inspection chamber 4 (4A, 4B,..., 4N)
- the inspected liquid crystal substrate is returned to the load lock chamber 5 (5A, 5B,. Open (5A, 5B,..., 5N) by opening the atmosphere side gate.
- the present invention selects a load lock chamber to be evacuated preferentially from among a plurality of load lock chambers to perform vacuum evacuation, and puts the other load lock chambers in a standby state, whereby a liquid crystal array inspection apparatus system Reduce overall inspection time.
- Each liquid crystal array inspection apparatus determines whether or not to give priority to vacuuming operation to the load lock chamber of the liquid crystal array inspection apparatus with another liquid crystal array inspection apparatus connected to each other via a network. If the following priority determination condition is satisfied, priority is given to the vacuuming operation of the load lock chamber of the liquid crystal array inspection apparatus, and the load lock rough pumping vacuum pump is switched and connected to the load lock chamber.
- the priority determination condition for giving priority to the vacuuming of the load lock chamber of the liquid crystal array inspection apparatus and waiting for the vacuum of the other liquid crystal array inspection apparatus is First condition: vacuuming by a roughing vacuum pump is in a competitive state among a plurality of liquid crystal array inspection apparatuses. Second condition: When the inspection time of the liquid crystal array inspection apparatus is compared with the inspection time of another competing liquid crystal array inspection apparatus, the inspection time of the priority liquid crystal array inspection apparatus is the shortest. Third condition: When the evacuation time required for evacuating the load lock chamber is compared with the difference time of the inspection time of the liquid crystal array inspection apparatus competing with the priority liquid crystal array inspection apparatus, the evacuation time is different. Below time. These are the three conditions.
- a vacuum pump for roughing is connected to the load lock chamber of the liquid crystal array inspection device, and priority is given to evacuation of the load lock chamber of the liquid crystal array inspection device. And waiting for evacuation of the load lock chamber of another competing liquid crystal array inspection apparatus.
- the standby determination condition for waiting the vacuum lock of the load lock chamber of the liquid crystal array inspection device and prioritizing the vacuum lock of the other liquid crystal array inspection device is: First condition: vacuuming by a roughing vacuum pump is in a competitive state among a plurality of liquid crystal array inspection apparatuses. Second condition: When the inspection time of the liquid crystal array inspection apparatus is compared with the inspection time of another competing liquid crystal array inspection apparatus, the inspection time of the standby liquid crystal array inspection apparatus is the inspection time of the other liquid crystal array inspection apparatus. Longer than.
- Third condition When the evacuation time required for evacuating the load lock chamber is compared with the difference time of the inspection time of the liquid crystal array inspection apparatus competing with the liquid crystal array inspection apparatus on standby, the evacuation time is different. Longer than time.
- the second condition and the third condition are in an exclusive relationship with the second condition and the third condition of the priority determination condition.
- FIG. 3 is a diagram for explaining the priority operation of evacuation of the load lock chamber according to the present invention. Similar to FIG. 12, the inspection when inspecting the liquid crystal substrates of the models having a short inspection time and the models having a long inspection time is performed. It is a figure for demonstrating the relationship of time.
- the relationship between the inspection times can be divided into three cases depending on the relationship between the difference between two inspection times (T1, T2) in which the vacuuming of the load lock chamber competes and the evacuation time Tv required for evacuation.
- 3 (a) to 3 (c) show the relationship between the evacuation time Tv and the difference
- Tv
- the case of Tv>
- the inspection time T1 is longer than the inspection time T2, and the liquid crystal array inspection apparatus at the inspection time T1 starts evacuation before the liquid crystal array inspection apparatus at the inspection time T2. Yes.
- inspection time Tv indicates the time excluding the evacuation time Tv in the operation time of the liquid crystal array inspection apparatus, and includes the time other than the time required for the inspection of the liquid crystal substrate.
- the evacuation of the liquid crystal array inspection apparatus B is in a standby state.
- the liquid crystal array inspection apparatus A having a short inspection time can advance the inspection ahead of the liquid crystal array inspection apparatus B having a long inspection time.
- the liquid crystal array inspection apparatus B starts a vacuuming operation. Thereafter, at the time indicated by td and th, when the inspection time T2 of the liquid crystal array inspection apparatus A is completed, the vacuuming operations of the two liquid crystal array inspection apparatuses A and B compete with each other, and the first priority determination condition is set. The condition is met. At this time, the liquid crystal array inspection apparatus A with the inspection time T2 having the short inspection time is prioritized from the second condition, and the evacuation operation of the liquid crystal array inspection apparatus B with the inspection time T1 having the long inspection time is interrupted.
- the evacuation time Tv of the liquid crystal array inspection apparatus A When the evacuation time Tv of the liquid crystal array inspection apparatus A has elapsed at the time indicated by te and ti, the evacuation of the liquid crystal array inspection apparatus B that has been interrupted is resumed.
- the liquid crystal array inspection apparatus B starts the inspection time when the evacuation is completed at the time indicated by tf and tj.
- the liquid crystal array inspection apparatus A starts evacuation after the inspection time T2 has elapsed.
- the liquid crystal array inspection apparatus B is suspended and placed in a standby state.
- the liquid crystal array inspection apparatus A having a short inspection time can advance the inspection ahead of the liquid crystal array inspection apparatus B having a long inspection time.
- FIG. 4 is used to explain the effect of the priority operation of the present invention.
- the present invention enables a liquid crystal array inspection apparatus with a short inspection time by preferentially executing a vacuum drawing operation of a load lock chamber over a liquid crystal array inspection apparatus with a short inspection time over a liquid crystal array inspection apparatus with a long inspection time. It is possible for the apparatus to advance the inspection by evacuating the liquid crystal array inspection apparatus having a long inspection time.
- the overtaking of the vacuum drawing by the liquid crystal array inspection apparatus means that the inspection of the other liquid crystal array inspection apparatus which has been delayed in the inspection cycle of the liquid crystal array inspection apparatus which has been advanced in the cycle of the vacuum drawing operation and the inspection operation.
- the delayed inspection cycle is the difference time of the inspection time. Only the delay is recovered and the preceding inspection cycle is approached.
- the number of inspection cycles required for a liquid crystal array inspection apparatus with a short inspection time to pass a liquid crystal array inspection apparatus with a long inspection time can be obtained by, for example, an expression of max (T1, T2) /
- max (T1, T2) represents an inspection time which is longer of the inspection time T1 and the inspection time T2
- represents a positive value of the difference between the inspection time T1 and the inspection time T2.
- FIG. 4A shows a case where the value of the above equation is “2”.
- the inspection time T2 the evacuation time Tv, and the waiting time Tw are included.
- the inspection cycle of the liquid crystal array inspection apparatus B is performed once
- the inspection cycle of the liquid crystal array inspection apparatus A consisting of the inspection time T1 and the evacuation time Tv is performed twice, so that each inspection cycle is almost
- the inspection cycle of the liquid crystal array inspection apparatus A approaches the inspection cycle of the liquid crystal array inspection apparatus B by the time corresponding to the above, and the next inspection cycle catches up with the preceding liquid crystal array inspection apparatus B inspection cycle.
- FIG. 4B shows a case where the value of the above formula is “4”.
- the inspection time T2 the evacuation time Tv, and the waiting time Tw are included.
- the inspection cycle of the liquid crystal array inspection apparatus B is performed once
- the inspection cycle of the liquid crystal array inspection apparatus A consisting of the inspection time T1 and the evacuation time Tv is performed twice, so that each inspection cycle is almost
- the inspection cycle of the liquid crystal array inspection apparatus A approaches the inspection cycle of the liquid crystal array inspection apparatus B by the time corresponding to the above, and catches up with the liquid crystal array inspection apparatus B inspection cycle preceding the fourth time.
- the inspection time T2 ends before the inspection time T1 ends, and evacuation is performed with the time width of the evacuation time Tv. After that, since the next inspection cycle can be performed, the liquid crystal array inspection apparatus A with a short inspection time T2 should advance the inspection ahead of the liquid crystal array inspection apparatus B with a long inspection time T1. Can do.
- FIG. 5 is a diagram for explaining the priority operation in the case of Tv ⁇
- FIG. 5A shows an example in which priority operation is not performed when Tv ⁇
- FIG. 5B shows a case where priority operation is performed when Tv ⁇
- FIGS. 6 and 7 show an operation example of the liquid crystal array inspection apparatus A in the configuration example shown in FIG.
- the liquid crystal array inspection apparatus A starts evacuation of the load lock chamber in the inspection of the liquid crystal substrate (S1), an inquiry signal is transmitted to another liquid crystal array inspection apparatus connected via the network.
- the liquid crystal array inspection device that starts evacuation sends an inquiry signal to the other liquid crystal array inspection device, and the load lock is performed in the following steps S2 to S18.
- Priority operation or standby operation is performed for vacuuming the chamber.
- the liquid crystal array inspection device that starts evacuation sends an inquiry signal to the remaining liquid crystal array inspection devices (S2), and sends an inquiry signal.
- Priority operation or standby operation is performed with respect to evacuation of the load lock chamber in the following steps S3 to S18 with each liquid crystal array inspection apparatus.
- the liquid crystal array inspection apparatus A makes an inquiry to the liquid crystal array inspection apparatus B. Will be described.
- the liquid crystal array inspection apparatus A receives the response signal from the liquid crystal array inspection apparatus B, and the tact time information of the inspection time Tb required when the liquid crystal array inspection apparatus B inspects the liquid crystal substrate from the response signal, and the liquid crystal array inspection apparatus B Obtains status information such as whether vacuuming is in operation, whether a vacuuming operation is scheduled, or whether there is no vacuuming operation and no operation schedule.
- FIG. 8 is a diagram for explaining tact time information and status information included in each liquid crystal array inspection apparatus.
- Each liquid crystal array inspection apparatus has a storage unit that stores a tact table and a status file in a recording unit in the control circuit.
- the tact time information of the liquid crystal array inspection apparatus and the tact time information of other liquid crystal array inspection apparatuses from which the response signals are obtained are stored. For example, when the inspection time (in the case of the liquid crystal array inspection apparatus A, inspection time Ta) is recorded and the inspection time of another liquid crystal array inspection apparatus acquired from the response signal (when the response signal is received from the liquid crystal array inspection apparatus B) Records the inspection time Tb).
- the status file stores the status information of the liquid crystal array inspection apparatus and the status information of the liquid crystal array inspection apparatus from which the response signal is obtained. For example, “1” is set when the evacuation operation is scheduled or the evacuation operation is scheduled, and “0” is set when the evacuation operation is neither active nor scheduled.
- FIG. 8A shows an example of a tact table and a status file.
- “0” is set as the status information of both liquid crystal array inspection apparatuses. is doing.
- FIG. 8C when the liquid crystal array inspection apparatus A is in operation or is scheduled to operate, and the liquid crystal array inspection apparatus B is neither in operation nor scheduled to operate in the vacuum operation, the liquid crystal array inspection apparatus “1” is set as the status information of A, and “0” is set as the status information of the liquid crystal array inspection apparatus B.
- FIG. 8B when neither the liquid crystal array inspection apparatus A nor the liquid crystal array inspection apparatus B is in the operation of the evacuation operation and is not scheduled to operate, “0” is set as the status information of both liquid crystal array inspection apparatuses. is doing.
- FIG. 8C when the liquid crystal array inspection apparatus A is in operation or is scheduled to operate, and the liquid crystal array inspection apparatus B is neither in operation nor scheduled to operate in the vacuum operation, the liquid crystal array inspection apparatus “1” is set as the status information of A, and “0” is set as
- the liquid crystal array inspection apparatus B determines whether the load lock chamber is being evacuated or scheduled to be evacuated, or whether it is not evacuated or scheduled to be evacuated. To do. This step is an operation corresponding to the first condition of the priority determination described above, and the vacuuming operation by the roughing vacuum pump is in a competitive state between the liquid crystal array inspection apparatus A and the liquid crystal array inspection apparatus B. (S4).
- step S4 If it is determined in step S4 that the evacuation operation by the roughing vacuum pump is not in a competitive state, the evacuation is performed in all other liquid crystal array inspection apparatuses connected to the network in step S12. Steps S2 to S4 are repeated until it is determined that the operation is not in a competition state. In this repetition process, the liquid crystal array inspection apparatus connected to the network is sequentially performed instead of the liquid crystal array inspection apparatus B described above (S12). If it is determined that the evacuation operation is not in competition with all the liquid crystal array inspection apparatuses other than the liquid crystal array inspection apparatus A, the evacuation of the liquid crystal array inspection apparatus A is started (S10).
- the determination step of S4 if it is determined that the evacuation operation by the roughing vacuum pump is in a competitive state, the evacuation time Tv of the liquid crystal array inspection apparatus A and the inspection time Ta of the liquid crystal array inspection apparatus A The absolute value
- This comparison step is an operation corresponding to the above-described third condition for priority determination (S5).
- evacuation time Tv is smaller than the inspection time difference
- evacuation of the liquid crystal array inspection apparatus A is started (S10).
- This comparison step is an operation corresponding to the second condition for the priority determination described above (S6).
- the liquid crystal array inspection apparatus A starts to be evacuated (S7) and sends an inquiry signal to the liquid crystal array inspection apparatus B.
- the response signal is received, the evacuation operation is monitored from the status information of the liquid crystal array inspection apparatus B (S8), and it waits until the evacuation operation of the competing liquid crystal array inspection apparatus B is completed (S9).
- evacuation of the liquid crystal array inspection apparatus A is started (S10).
- the liquid crystal array inspection apparatus A starts a vacuuming operation and then receives an interruption signal from another liquid crystal array inspection apparatus (S13), the liquid crystal array inspection apparatus A stops the vacuuming (S14).
- An inquiry signal is sent to the liquid crystal array inspection device that sent the interruption signal and a response signal is received (S15).
- the vacuuming operation is monitored from the status information of the liquid crystal array inspection device. Wait until completion (S16), and after the evacuation operation of the liquid crystal array inspection apparatus is completed, the evacuation of the liquid crystal array inspection apparatus A is resumed (S17). After the evacuation operation of the liquid crystal array inspection apparatus A is completed (S18), the status information of the liquid crystal array inspection apparatus A in the status file of the liquid crystal array inspection apparatus A is rewritten to the state during the evacuation operation (S19).
- 6 and 7 are priority determinations performed by the liquid crystal array inspection apparatus A with the liquid crystal array inspection apparatus B.
- the liquid crystal array inspection device A makes a priority determination with the liquid crystal array inspection device B, and then other devices connected via the network. Similarly, priority determination is performed with the liquid crystal array inspection apparatus.
- FIG. 9 is a flowchart for explaining priority determination performed with a liquid crystal array inspection apparatus connected via a network.
- the liquid crystal array inspection apparatus A performs priority determination with the liquid crystal array inspection apparatus B (S21), and then the liquid crystal array inspection apparatus A performs priority determination with the liquid crystal array inspection apparatus C (S22).
- Priority determination is sequentially performed with other liquid crystal array inspection apparatuses (S23), and the priority determination is repeated in order.
- FIG. 10 is a block diagram showing a configuration example of the liquid crystal array inspection apparatus of the present invention. Note that this configuration example is merely an example, and is not limited to this configuration.
- the configuration example may be realized by software using a CPU and a program recorded in a memory, or may be realized by hardware.
- the liquid crystal array inspection device 2 includes an inspection room 4, a load lock chamber 5, and a control circuit unit 3 that controls the liquid crystal array inspection device.
- the inspection chamber 4 is a chamber that performs an array inspection of the liquid crystal substrate in a vacuum state.
- the load lock chamber 5 is a chamber that introduces an uninspected liquid crystal substrate from the atmosphere side to the inspection chamber 4 side, and leads out the inspected liquid crystal substrate from the inspection chamber 4 side to the atmosphere side. Via a connection switching device 6, connection with a load lock roughing vacuum pump 17 (not shown) can be switched.
- liquid crystal array inspection apparatus 2A performs priority determination with the liquid crystal array inspection apparatus 2B is shown as an example.
- the control circuit unit 3 includes a control part for performing priority operation by performing a vacuuming priority determination characteristic of the present invention, in addition to a control part normally provided in the liquid crystal array inspection apparatus for performing the liquid crystal array inspection.
- the control circuit unit 3 includes a control unit 3a that controls the entire liquid crystal array inspection apparatus, performs priority determination, and controls priority operations.
- the control unit 3a controls the inspection control unit 3b to control the array inspection of the liquid crystal substrate performed in the inspection room 4.
- the control unit 3a controls the load lock control unit 3c to control the opening and closing of the gate performed in the load lock chamber 5.
- the inspection control unit 3b and the load lock control unit 3c are normally controlled in the liquid crystal array inspection apparatus.
- the control circuit unit 3 includes a connection control unit 3d, a storage unit 3e, a priority determination unit 3f, an inquiry unit 3g, and a transmission / reception unit 3h as control units for performing priority operation by performing vacuum determination that is characteristic of the present invention. Prepare.
- connection control unit 3d controls the connection switching device 6 to control connection switching between the load lock chamber 5 and the load lock roughing vacuum pump 17 (not shown), thereby evacuating the load lock chamber 5. And control air introduction.
- the storage unit 3e has storage areas for a tact table 3e1 and a status file 3e2.
- the tact table 3e1 is an inspection time acquired from another liquid crystal array inspection device 2B connected via the network 8 when performing priority determination, in addition to the inspection time Ta required for the liquid crystal array inspection device 2A to perform the array inspection of the liquid crystal substrate. Tb is stored as tact time information.
- the tact table 3e1 stores the evacuation time Tv required to evacuate the load lock chamber as tact time information.
- the status file 3e2 stores the evacuation state of whether the load lock chamber of the liquid crystal array inspection apparatus 2A is evacuating, whether evacuation is scheduled, or whether evacuation is not scheduled even during the evacuation operation. In addition, the evacuation state acquired from the other liquid crystal array inspection apparatus 2B connected via the network 8 when the priority determination is performed is stored.
- the priority determination unit 3f performs priority determination by reading the tact time information and status information stored in the tact table 3e1 and the status file 3e2 of the storage unit 3e when performing vacuuming. The determination result is sent to the control unit 3a, and inspection control by the inspection control unit 3b and switching control of the connection switching device 6 by the connection control unit 3d are performed.
- the inquiry unit 3g When the inquiry unit 3g receives the evacuation command output from the control unit 3a, the inquiry unit 3g instructs the inquiry signal transmitted to the liquid crystal array inspection apparatus connected via the network 8 to be transmitted. Further, the tact time information and the status information are sent to the storage unit 3e from the answer signal received by the transmission / reception unit 3h.
- the inquiry unit 3g instructs the transmission / reception unit 3h to transmit the interruption signal when the priority determination unit 3f is instructed to transmit the interruption signal.
- the transmission / reception unit 3h transmits an inquiry signal and an interruption signal from the inquiry unit 3g via the network 8, and sends an answer signal received via the network 8 to the inquiry unit 3g.
- Priority determination of evacuation provided in the liquid crystal array inspection apparatus of the present invention can be applied not only to the liquid crystal substrate but also to other semiconductor substrate inspection apparatuses.
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Abstract
Description
第1の条件:粗引き用真空ポンプによる真空引きが複数の液晶アレイ検査装置の間で競合状態にある。
第2の条件:液晶アレイ検査装置の検査時間と、競合する他の液晶アレイ検査装置の検査時間とを比較したとき、優先する液晶アレイ検査装置の検査時間は最も短い。
第3の条件:ロードロック室を真空引きするに要する真空引き時間と、優先する液晶アレイ検査装置と競合する液晶アレイ検査装置の検査時間の差分時間とを比較したときに、真空引き時間が差分時間以下である。
の3つの条件である。
第1の条件:粗引き用真空ポンプによる真空引きが複数の液晶アレイ検査装置の間で競合状態にある。
第2の条件:液晶アレイ検査装置の検査時間と、競合する他の液晶アレイ検査装置の検査時間とを比較したとき、待機する液晶アレイ検査装置の検査時間は他の液晶アレイ検査装置の検査時間よりも長い。
第3の条件:ロードロック室を真空引きするに要する真空引き時間と、待機する液晶アレイ検査装置と競合する液晶アレイ検査装置の検査時間の差分時間とを比較したときに、真空引き時間が差分時間よりも長い。
の3つの条件であり、第2の条件および第3の条件は優先判定条件の第2の条件および第3の条件と排他的な関係にある。
図3は、本発明によるロードロック室の真空引きの優先動作を説明するための図であり、前記した図12と同様に、検査時間が短い機種と長い機種の液晶基板を検査する際の検査時間の関係を説明するための図である。
Claims (6)
- 液晶基板を真空状態で検査する検査室と液晶基板を前記検査室に対して導出入するロードロック室とをそれぞれに備える複数台の液晶アレイ検査装置と、
前記各ロードロック室を粗い真空度で真空引きする前記液晶アレイ検査装置の台数よりも少ない台数の粗引き用真空ポンプとを備えた液晶アレイ検査装置システムにおいて、
前記粗引き用真空ポンプによる真空引きが複数の液晶アレイ検査装置で競合するとき、各液晶アレイ検査装置は、当該液晶アレイ検査装置の検査時間と、競合する液晶アレイ検査装置の検査時間とを比較し、
前記ロードロック室を真空引きするに要する真空引き時間と、競合する両液晶アレイ検査装置の検査時間の差分時間とを比較し、
前記真空引き時間が前記差分時間以下のときに、前記検査時間が最も短い液晶アレイ検査装置のロードロック室に粗引き用真空ポンプを接続して、検査時間が最も短い液晶アレイ検査装置のロードロック室の真空引きを優先させ、競合する液晶アレイ検査装置のロードロック室の真空引きを待機させることを特徴とする液晶アレイ検査装置システムの真空引き方法。 - 前記液晶アレイ検査装置システムは、前記ロードロック室と前記粗引き用真空ポンプとの間の接続関係を切替え、前記各粗引き用真空ポンプを前記ロードロック室の何れか一室に切り替え自在とする接続切替装置を備え、
前記粗引き用真空ポンプによる真空引きが複数の液晶アレイ検査装置で競合するとき、各液晶アレイ検査装置は、当該液晶アレイ検査装置の検査時間と、競合する液晶アレイ検査装置の検査時間を比較し、
前記ロードロック室を真空引きするに要する真空引き時間と、競合する両液晶アレイ検査装置の検査時間の差分時間とを比較し、
前記真空引き時間が前記差分時間以下のときに、前記接続切替装置の切り替えを制御して検査時間が最も短い液晶アレイ検査装置のロードロック室に粗引き用真空ポンプを接続して、検査時間が最も短い液晶アレイ検査装置のロードロック室の真空引きを優先させ、競合する液晶アレイ検査装置のロードロック室の真空引きを待機させることを特徴とする請求項1に記載の液晶アレイ検査装置システムの真空引き方法。 - 前記競合する液晶アレイ検査装置の内、優先されない液晶アレイ検査装置が真空引き動作中であるときは、当該液晶アレイ検査装置の真空引き動作を中断し、
前記優先された液晶アレイ検査装置の真空引きが終了した後、前記中断した液晶アレイ検査装置の真空引き動作を再開することを特徴とする請求項1又は2に記載の液晶アレイ検査装置システムの真空引き方法。 - 液晶基板を真空状態で検査する検査室と液晶基板を前記検査室内に導出入するロードロック室をそれぞれに備える複数台の液晶アレイ検査装置と、
前記各ロードロック室を粗い真空度で真空引きする前記液晶アレイ検査装置の台数よりも少ない台数の粗引き用真空ポンプと、
前記ロードロック室と前記粗引き用真空ポンプとの間の接続関係を切替え、前記各粗引き用真空ポンプを前記ロードロック室の何れか一室に切り替え自在とする接続切替装置とを備え、
前記各液晶アレイ検査装置は、前記粗引き用真空ポンプによるロードロック室の真空引きが競合するときに、競合する液晶アレイ検査装置の検査時間を比較し、前記ロードロック室を真空引きするに要する真空引き時間と、競合する両液晶アレイ検査装置の検査時間の差分時間とを比較し、
前記真空引き時間が前記差分時間以下のときに、前記接続切替装置の切替を制御して検査時間が最も短い液晶アレイ検査装置のロードロック室に粗引き用真空ポンプを接続して、検査時間が最も短い液晶アレイ検査装置のロードロック室の真空引きを優先させ、競合する液晶アレイ検査装置のロードロック室の真空引きを待機させることを特徴とする液晶アレイ検査装置システム。 - 前記各液晶アレイ検査装置はネットワークを介して接続し、当該ネットワークを介して競合する液晶アレイ検査装置の検査時間、および真空引きの駆動情報を取得し、
取得した検査時間と当該液晶アレイ検査装置の検査時間とを比較し、
取得した真空引きの駆動情報に基づいて競合状態を判定することを特徴とする請求項4に記載の液晶アレイ検査装置システム。 - 液晶基板を真空状態で検査する検査室と、液晶基板を前記検査室内に導出入するロードロック室とを備える液晶アレイ検査装置において、
前記ロードロック室は、当該ロードロック室を粗い真空度で真空引きする前記液晶アレイ検査装置の台数よりも少ない台数の粗引き用真空ポンプと、他の液晶アレイ検査装置のロードロック室の何れか一室に切り替え自在とし、
前記粗引き用真空ポンプによるロードロック室の真空引きが競合するときに、競合する液晶アレイ検査装置の検査時間を比較し、前記ロードロック室を真空引きするに要する真空引き時間と、競合する両液晶アレイ検査装置の検査時間の差分時間とを比較し、前記真空引き時間が前記差分時間以下のときに、検査時間が最も短い液晶アレイ検査装置のロードロック室に前記粗引き用真空ポンプを接続して、検査時間が最も短い液晶アレイ検査装置のロードロック室の真空引きを優先させる優先させ、競合する液晶アレイ検査装置のロードロック室の真空引きを待機させることを特徴とする液晶アレイ検査装置。
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CN200880131293.XA CN102165325B (zh) | 2008-12-16 | 2008-12-16 | 液晶阵列检查装置、系统、以及其抽真空方法 |
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