Source: https://patents.google.com/patent/CN101551231B/en
Timestamp: 2020-04-09 11:11:14
Document Index: 716914220

Matched Legal Cases: ['art.\n10', 'art; 162', 'art 14', 'art 14', 'art 14', 'art 14', 'art 14', 'art 14', 'art 14', 'art 14', 'art 14', 'art 162', 'art 162', 'art 162', 'arts 162', 'art 162', 'arts 162', 'arts 162', 'arts 162', 'arts 162', 'art 162', 'art 162', 'art 162', 'arts 162', 'art 162', 'art 162', 'arts 162', 'art 162', 'arts 162', 'arts 162', 'arts 162', 'arts 162', 'arts 162', 'art 162', 'arts 162', 'arts 162', 'arts 162', 'arts 162', 'arts 162', 'arts 162', 'arts 162', 'arts 162', 'arts 162', 'arts 162', 'arts 162', 'art 162', 'art 162', 'art 162', 'art 14', 'art 162', 'arts 162', 'arts 162', 'art 14', 'arts 162', 'arts 162', 'arts 162', 'arts 162', 'arts 162', 'art 162', 'arts 162', 'arts 162', 'arts 162', 'arts 162', 'arts 162', 'arts 162', 'art 14', 'art 14', 'arts 162', 'art 162', 'arts 162', 'art 162', 'arts 162', 'art 162', 'arts 162', 'arts 162', 'arts 162', 'arts 162', 'arts 162', 'arts 162', 'arts 162', 'arts 162', 'arts 162', 'art 27', 'art 27', 'art 271']

CN101551231B - Alignment method, tip position detecting device and probe apparatus - Google Patents
Alignment method, tip position detecting device and probe apparatus Download PDF
CN101551231B
CN101551231B CN2009101336216A CN200910133621A CN101551231B CN 101551231 B CN101551231 B CN 101551231B CN 2009101336216 A CN2009101336216 A CN 2009101336216A CN 200910133621 A CN200910133621 A CN 200910133621A CN 101551231 B CN101551231 B CN 101551231B
CN2009101336216A
CN101551231A (en
渡边哲治
川路武司
2008-04-02 Priority to JP2008-096646 priority Critical
2008-04-02 Priority to JP2008096646 priority
2008-04-02 Priority to JP2008096646A priority patent/JP5260119B2/en
2009-04-02 Application filed by 东京毅力科创株式会社 filed Critical 东京毅力科创株式会社
2009-10-07 Publication of CN101551231A publication Critical patent/CN101551231A/en
2011-12-21 Publication of CN101551231B publication Critical patent/CN101551231B/en
The invention provides an alignment method, a detecting device for needle position and a probe device, which can simplify multiple probe height detecting procedures with a short time and high precision, and enhance detecting reliability. The alignment method comprises: a procedure of using the detecting device for needle position (16) to detect the needle position for multiple probes (12A) while processing the alignment for semiconductor wafer (W) and the multiple probes (12A); a procedure of using a lower CCD camera (13B) to detect the needle positions of the multiple probes (12A) by the detecting device for needle position (16); a procedure of transferring needle tracks of the multiple probes (12A) to a soft material component (162D) of the detecting device for needle position (16); a procedure of using an upper CCD camera (13A) to detect the needle tracks 162F of the multiple probes; and a procedure of using the upper CCD camera (13A) to detect an electrode mat of the semiconductor wafer (W).
Calibration steps, tip position detecting device and probe unit
The present invention relates to employed calibration steps, tip position detecting device and probe unit when the tested electrical characteristics of having a medical check-up of carrying out semiconductor wafer etc. are checked, in more detail, the present invention relates to carry out accurately tested having a medical check-up and check calibration steps, tip position detecting device and the probe unit of reliability with the calibration of a plurality of probes with raising.
When the tested electrical characteristics of having a medical check-up of using a plurality of probes to carry out semiconductor wafer etc. are checked, for example, utilize camera that the needle point that is arranged on a plurality of probes on the probe is made a video recording, thereby detect the position of the needle point of probe, tested electronic pads of having a medical check-up is contacted with probe check.For the tip position detection of the probe that uses camera to carry out, make the needle point of probe and the focus focusing of camera need spended time, its result, because tested have a medical check-up and the calibration process of probe in have to the expensive time, so, usually whole probes is not carried out, and just for example select a plurality of probes to calibrate typically.
But, under the situation of electronic pads granular, because the possibility that exists whole probes not coincide mutually with electronic pads separately, so hope detects the position of the needle point of whole probes as much as possible.Moreover, in the manufacture process of probe, also there is deviation, even if the probe of same size also is difficult to avoid existing deviation on making, therefore seeks more high-precision needle point and detect.
In addition, in order to develop the probe of various kinds from a plurality of probe, be necessary to develop the algorithm (algorithm) that at every turn a plurality of probes is carried out the special use of image recognition with three dimensional constitution.Corresponding with it because expend a large amount of consumption, so as long as can be on the film of two dimension a plurality of probes of transcription, then can easily carry out the exploitation of algorithm.
For example, in patent documentation 1, record the detection method of the calibration of carrying out probe and wafer.In the method, with the needle tracking transcription of probe at the wafer that is calibrated on the worktable or be attached on the sheet material on the worktable, to wafer towards with a plurality of probes towards comparing, revise worktable towards, afterwards, make the XY coordinate of fiducial chip of wafer consistent with the XY coordinate of a plurality of probes.
In addition, in patent documentation 2, record the method for the state of the needle point that uses transcription sheet material detector probe.In the method, the transcription sheet material crimping on the probe that makes thermal expansion and the brace table that is configured in the mounting table side writes on needle tracking on the transcription sheet material, behind the needle tracking that detects on the transcription sheet material, probe after the thermal expansion and wafer is carried out position correction.
In addition, in patent documentation 3, record localization method.In the method, the needle tracking of needle point is write on sample (simulation) wafer, and utilize camera to detect, discern the direction and the desired location of probe thus.
Yet, in patent documentation 1, do not put down in writing this one side of needle point as the detector probe of the key factor of calibrating.In addition, in the technology of patent documentation 2, though be the XY coordinate data that obtains a plurality of probes according to the needle tracking that is formed at a plurality of probes on the transcription sheet material,, when detecting the height of needle point, must detect the degree of depth of needle tracking, therefore be difficult to try to achieve accurately the needle point height.In addition, in the technology of patent documentation 3,, therefore identical with the technology of patent documentation 2 because be the tip position of trying to achieve a plurality of probes according to the needle tracking of sample wafer, though can access the XY coordinate data of needle point, the Z coordinate data of needle point has to depend on camera.
Therefore, the applicant proposes to have the detection method of the probe front of the tip position that can detect probe accurately in patent documentation 4.With reference to Figure 10 (a)～(g) this method is carried out simple declaration.In the method, at first, shown in Figure 10 (a), to the focus of the last CCD camera 1 on the calibration bridge (scheming not shown) that is attached to correcting mechanism and the focus that is attached to the following CCD camera 3 on the mounting table 2 be attached to target (target) 4 on the mounting table 2 location of focusing, try to achieve the reference position of mounting table 2.Then, shown in this figure (b), during mounting table 2 moves, camera 1 is explored the tip position detecting device 6 of the needle point of a plurality of probe 5A that are used for detector probe card 5 in the utilization, camera 1 detects the top position of tip position detecting device 6 in the utilization, according to the position of mounting table 2 of this moment try to achieve tip position detecting device 6 top position (x, y, z).Then, shown in this figure (c), utilizing down, CCD camera 3 detects the front position that is attached to the virtual pin 7 on the calibration bridge.Then, shown in this figure (d), the tip position detecting device 6 that detects top position is contacted with virtual pin 7, confirm whether tip position detecting device 6 moves, after confirming action, shown in this figure (e), detect the top position of tip position detecting device 6 once more.Like this on detect tip position detecting device 6 after the position, shown in this figure (f), a plurality of probe 5A of probe 5 are contacted with the top of tip position detecting device 6, try to achieve the tip position (x of probe 5A at this moment according to the position of mounting table 4, y, z).Then, (x, y z) are target, and mounting table 4 is moved, and utilize CCD camera 2 to detect the needle point of a plurality of probe 5A rapidly and accurately with the tip position that utilizes tip position detecting device 6 detected probe 5A.At this moment, because judge the tip position of probe 5A, so can be simply to the focus of CCD camera 2 and the needle point of probe 5A are focused down.
Yet, in the related technology of patent documentation 4, the reverse side that can detect the tip position of a plurality of probe 5A accurately is, to detecting a plurality of operations shown in (a)～(f) that needs to implement this figure till a plurality of probe 5A, therefore, have in the detection of the tip position of a plurality of probe 5A, expend the more time.
Patent documentation 1: the special fair 05-067059 communique of Japan
Patent documentation 2: TOHKEMY 2005-079253 communique
Patent documentation 3: Japanese kokai publication hei 02-224260 communique
Patent documentation 4: TOHKEMY 2007-324340 communique
The present invention finishes in order to address the above problem, its purpose be to provide a kind of operation that can simplify the height that detects a plurality of probes, can the short time and carry out the electrode of tested inspection usefulness of having a medical check-up and the calibration of a plurality of probes accurately, and can further improve calibration steps, tip position detecting device and the probe unit of the reliability of inspection.
The calibration steps of first aspect present invention record, it is characterized in that: this calibration steps tested on the mounting table that at every turn allows to move had a medical check-up and a plurality of probes electrically contact and carry out described tested electrical characteristics of having a medical check-up when checking, use can be configured in the top of described mounting table and movably to described tested first image unit of having a medical check-up and making a video recording, second image unit that is installed on the described mounting table and described probe is made a video recording, and be installed on the described mounting table and the tip position detecting device that detects the needle point of described a plurality of probes comes described tested have a medical check-up and described a plurality of probes are calibrated, it comprises: the A operation, and use described tip position detecting device to detect the tip position of described a plurality of probes; The B operation uses described second image unit that the tip position that utilizes the detected described a plurality of probes of described tip position detecting device is detected; The C operation makes the soft parts that are installed on the described tip position detecting device contact with described a plurality of probes, with the needle tracking transcription of described a plurality of probes on described soft parts; The D operation uses described first image unit that the needle tracking that is formed at the described a plurality of probes on the described soft parts is detected; With the E operation, use pair described tested inspection of having a medical check-up corresponding of described first image unit to detect with electrode with described a plurality of probes.
In addition, the calibration steps of second aspect present invention record, it is characterized in that: in the invention of first aspect record, described tip position detecting device comprise the sensor part of the needle point that detects described a plurality of probes and belong to this sensor part can lifting contact, described A operation comprises: first operation, described tip position detecting device moves via described mounting table, and described contact is contacted with the needle point of described a plurality of probes; Second operation by being moved further of described mounting table, makes described contact to described sensor part one side shifting in the mode that does not make described a plurality of probe generation deflections; With the 3rd operation, detect position that described contact begins to move tip position as described a plurality of probes.
In addition, the calibration steps of third aspect present invention record is characterized in that: in the invention of second aspect record, in described second operation, described a plurality of probes can not scratch described soft parts.
In addition, the calibration steps of fourth aspect present invention record is characterized in that: second or the invention of third aspect record in, in described second operation, utilize displacement transducer to detect the present position of described contact.
In addition, the calibration steps of fifth aspect present invention record is characterized in that: in the invention of fourth aspect record, in described the 3rd operation, detect the tip position of described a plurality of probes according to the testing result of described displacement transducer.
In addition, the tip position detecting device of sixth aspect present invention record, it is characterized in that: this tip position detecting device make at every turn tested have a medical check-up to electrically contact with a plurality of probes carry out described tested electrical characteristics of having a medical check-up when checking, be used to detect the position of the needle point of described a plurality of probes, described tip position detecting device has the sensor part of the needle point that detects described a plurality of probes, and, described sensor part has the sensor part main body, can be arranged on the contact on the described sensor main body up and down, and described contact applied authorised pressure, make described contact and described sensor main body leave the pressure applying unit of predetermined distance, and, described sensor part main body has the resilient support mechanism that flexibly supports described contact under the described authorised pressure that is applied by described pressure applying unit, and described contact detects the tip position of described a plurality of probes by contacting with described a plurality of probes to descend to described sensor part main body one side under described authorised pressure.
The tip position detecting device of seventh aspect present invention record is characterized in that: aspect the 6th in the invention of record, described sensor part has the displacement transducer of the present position that is used to detect described contact.
In addition, the probe unit of eighth aspect present invention is characterized in that: this probe unit comprises: the tested mounting table that can move of having a medical check-up of mounting; Be configured in a plurality of probes of the top of this mounting table; With the tip position detecting device that is arranged on the tip position that is used for detecting these probes on the described mounting table, described tip position detecting device has the sensor part of the needle point that detects described a plurality of probes, and, described sensor part has the sensor part main body, can be arranged on the contact on the described sensor part main body up and down, and described contact applied authorised pressure, make described contact and described sensor part main body leave the pressure applying unit of predetermined distance, and, described sensor main body has the resilient support mechanism that flexibly supports described contact under the described authorised pressure that is applied by described pressure applying unit, and described contact detects the tip position of described a plurality of probes by contacting with described a plurality of probes to descend to described sensor part main body one side under described authorised pressure.
The probe unit of ninth aspect present invention record is characterized in that: in the invention of eight aspect record, described mounting table is provided with the needle tracking transcription means of the needle tracking that is used for the described a plurality of probes of transcription.
The probe unit of tenth aspect present invention record is characterized in that: aspect the 8th or the 9th in the invention of record, described sensor part has the displacement transducer of the present position that is used to detect described contact.
The present invention the tenth is the probe unit of record on the one hand, it is characterized in that: in the invention of record, described needle tracking transcription means has the soft parts that freely load and unload aspect the 9th or the tenth.
The probe unit of the present invention the 12 aspect record, it is characterized in that: in the 9th to the tenth invention of putting down in writing on the one hand, described needle tracking transcription means has the contact that described soft parts are installed with freely loading and unloading and can support the lift drive mechanism of described contact up and down.
According to the present invention, can provide a kind of operation that can simplify the height that detects a plurality of probes, can the short time and carry out the electrode of tested inspection usefulness of having a medical check-up and the calibration of a plurality of probes accurately, and can further improve calibration steps, tip position detecting device and the probe unit of the reliability of inspection.
Fig. 1 is the pie graph of an embodiment of expression probe unit of the present invention.
Fig. 2 is the outboard profile that is illustrated in employed tip position detecting device in the probe unit of Fig. 1.
Fig. 3 (a)～(c) is respectively the specification figure that is illustrated in the operation that the top height to tip position detecting device of implementing to carry out before the calibration steps of the present invention detects.
Fig. 4 (a)～(c) is respectively the specification figure of the major part of an embodiment representing calibration steps of the present invention.
Fig. 5 (a)～(d) is respectively the specification figure that represents the calibration steps that the then operation of Fig. 4 is carried out according to process sequence.
Fig. 6 (a) and (b) are respectively the figure that expression proposes operation shown in (b), (c) of Fig. 5, (a) be the sectional view of the operation of the formation needle tracking shown in the presentation graphs 5 (b), (b) are the sectional view of the operation of the XY coordinate of the needle tracking shown in expression detection Fig. 4 (c).
Fig. 7 is the specification figure of the finishing operation of the calibration procedure shown in the presentation graphs 5 (a)～(d).
Fig. 8 is other the stereographic map of major part of embodiment of expression probe unit of the present invention.
Fig. 9 (a) and (b) are to be illustrated in employed other the key diagram of tip position detecting device in the probe unit shown in Figure 1, (a) are the block diagram of expression contact propradation, (b) sectional view of the state that descends to sensor part for the expression contact.
Figure 10 (a)～(g) is respectively the key diagram that is used for illustrating according to process sequence calibration steps of the prior art.
10: probe unit; 11: wafer chuck; 12: probe; 12A: probe; 13A: go up CCD camera (first image unit); 13B: following CCD camera (second image unit); 16,16A, 26: tip position detecting device; 16B: needle tracking transcription means; 161 ': lift drive mechanism; 162: sensor part; 162A, 271: sensor part main body; 162C, 162C ', 272: contact; 162D, 162D ': soft parts; 271: cylinder mechanism (resilient support mechanism); 273: electronic controller (Electronic Regulator) (electronic regulator) (pressure applying means); W: semiconductor wafer (tested having a medical check-up)
Below.Based on Fig. 1～the present invention will be described for embodiment shown in Figure 9.Wherein, in each figure, Fig. 1 is the pie graph of an embodiment of expression probe unit of the present invention; Fig. 2 is the outboard profile that is illustrated in employed tip position detecting device in the probe unit of Fig. 1; Fig. 3 (a)～(c) is for being illustrated respectively in the specification figure of the operation of carrying out before the calibration steps of the present invention, the top height of tip position detecting device is detected; Fig. 4 (a)～(c) is the specification figure of the major part of an embodiment representing calibration steps of the present invention respectively; Fig. 5 (a)～(d) is for representing the specification figure of the calibration steps that the then operation of Fig. 4 is carried out according to process sequence; Fig. 6 (a) and (b) are the figure of operation shown in (b) that propose Fig. 5 of expression respectively, (c), (a) be the sectional view of the operation of the formation needle tracking shown in the presentation graphs 5 (b), (b) are the sectional view of the operation of the XY coordinate of the needle tracking shown in expression detection Fig. 4 (c); Fig. 7 is the specification figure of the finishing operation of the calibration procedure shown in the presentation graphs 5 (a)～(d); Fig. 8 is other the stereographic map of major part of embodiment of expression probe unit of the present invention; Fig. 9 (a) and (b) are to be illustrated in employed other the key diagram of tip position detecting device in the probe unit shown in Figure 1, (a) are the block diagram of expression contact propradation, (b) sectional view of the state that descends to sensor part for the expression contact.
At first, for example with reference to Fig. 1, the probe unit of present embodiment is described.As shown in Figure 1, the probe unit 10 of present embodiment comprises: mounting is as the wafer chuck that can move 11 of the semiconductor wafer W of detected body; Be configured in the probe 12 of the top of this wafer chuck 11; The correcting mechanism 13 that a plurality of probe 12A and the semiconductor wafer W on the wafer chuck 11 of this probe 12 are calibrated; Be used for the control device 14 of formation machine of control wafer chuck 11 and correcting mechanism 13 etc., under the control of control device 14, correcting mechanism 13 drives, the electronic pads of the semiconductor wafer W on the wafer chuck 11 and a plurality of probe 12A of probe 12 are calibrated, after this, a plurality of probe 12A and the electronic pads corresponding with it are electrically contacted, the electrical characteristics of semiconductor wafer W are checked.
Wafer chuck 11 constitutes and can move on X, Y, Z and θ direction by the driving mechanism 15 that drives under the control of control device 14.Dispose the tip position detecting device 16 of present embodiment in the side of this wafer chuck 11.This tip position detecting device 16 is used to detect the position of the needle point of a plurality of probe 12A, is applied in aftermentioned tip position detection method of the present invention and the calibration steps.
Probe 12 is installed on the top board 18 of probe chamber by card retainer 17, under the state that the electronic pads that makes a plurality of probe 12A and the semiconductor wafer W corresponding with it electrically contacts, the electrical characteristics of semiconductor wafer W are checked according to the signal that comes from testing apparatus (scheming not shown) side.
In addition, as shown in Figure 1, correcting mechanism 13 comprises: square from it first image unit that semiconductor wafer W is made a video recording (going up the CCD camera) 13A; Be configured in the side of wafer chuck 11 and second image unit (the following CCD camera) 13B that the probe 12A of probe 12 is made a video recording from its below; With support to go up CCD camera 13A can unidirectional mobile calibration bridge 13C, under the control of control device 14, last CCD camera 13A can by calibration bridge 13C move to from position of readiness probe 12 the center under (below, be called " probe core "), and stop at this position.The last CCD camera 13A that is positioned at probe core when calibration during wafer chuck 11 moves along X, Y direction from above the electronic pads of the semiconductor wafer W on the wafer chuck 11 is made a video recording, in its image processing part 14C, carry out Flame Image Process, show photographed images in display frame (scheming not shown).Following CCD camera 13B made a video recording to the regulation probe 12A of probe 12 under from it during wafer chuck 11 moves along X, Y direction in when calibration, in its image processing part 14C, carry out Flame Image Process, show photographed images in display frame (scheming not shown).In addition, last CCD camera 13A makes a video recording to setting up the tip position detecting device 16 that is installed on the wafer chuck 11 as described later, carries out Flame Image Process and is presented in the display frame.
In addition, as shown in Figure 1, control device 14 comprises calculation handling part 14A, storage part 14B and above-mentioned image processing part 14C.By the various programs that are stored among the storage part 14B probe unit 10 is controlled.Therefore, the program of implementing calibration steps of the present invention is stored among the storage part 14B.This calibration steps is implemented according to the program of reading from storage part 14B, and the various data that its result obtains are stored among the storage part 14B.
As shown in Figure 1 and Figure 2, tip position detecting device 16 used in the present invention has lift drive mechanism 161 of cylinder etc. and the sensor mechanism 162 of carrying out lifting by lift drive mechanism 161.When the tip position to a plurality of probe 12A detects, lift drive mechanism 161 make sensor mechanism 162 from position of readiness rise to wafer chuck 11 on semiconductor wafer W above roughly the same height.
For example, as shown in Figure 2, sensor mechanism 162 comprises: be built-in with cylinder mechanism and play the sensor part 162A of displacement transducer effect; Be installed in the cylinder mechanism that constitutes sensor part 162A piston rod 162B the upper end and remain on from the contact 162C of the position that sensor part 162A floats; Loading and unloading are installed in the soft parts 162D of the top sheet of contact 162C freely; With in the cylinder body that constitutes sensor part 162A, supply with pressurized air, contact 162C is applied the pressure applying unit (scheming not shown) of the pressurized air supply source etc. of authorised pressure by the piston in the cylinder body (scheming not shown).
In addition, as shown in Figure 2, contact 162C is built-in with for example well heater 162E.This well heater 162E heats soft parts 162D so that soft parts 162D is softening, thereby as described later, makes the needle tracking (needle point vestige) of a plurality of probe 12As of transfer printing on soft parts 162D disappear.Thus, can use soft parts 162D repeatedly.
In addition, card is installed in the lower end of piston rod 162B ends plate (scheme not shown), contact 162C by card only plate separate the position that predetermined distance floats and flexibly remain among the sensor part 162A at the 162A of range sensor portion all the time.The gap that forms between contact 162C and sensor part 162A is the range of contact 162C.The distance in this gap detects by sensor part 162A, and 162A monitors the position of contact 162C all the time by this sensor part.
The pressure applying unit can be switched the pressure that first pressure and second pressure are used as stipulating.The pressure that first pressure sets when detecting the tip position of a plurality of probe 12A is set to the pressure lower than second pressure.The pressure that second pressure set the needle tracking transcription above soft parts 162D the time for a plurality of probe 12A for when calibration.
Sensor part 162A be provided with will regulation pressure remain the pressure adjustment unit (scheming not shown) of certain constant pressure valve etc., by this pressure adjustment unit, to keep first pressure be constant thereby gently discharge pressurized air at contact 162C when sensor part 162A descends.
Be maintained under first pressure status at contact 162C, even if by wafer chuck 11, tip position detecting device 16 rises, this contact 162C contacts with a plurality of probe 12A via soft parts 162D, deflection does not take place in a plurality of probe 12A yet, and contact 162C descends to sensor part 162A side under the state of the tip position that keeps the initial stage.Remaining under first pressure status at contact 162C, is the power of 0.5gf for example from a plurality of probe 12A to average each the probe 12A of soft parts 162D effect.Soft parts 162D is formed by following material, has pin to press from a plurality of probe 12A effect even if this material has soft parts 162D when contacting with a plurality of probe 12A under first pressure, also can not take place to produce the hardness of damaging because of a plurality of probe 12A burs etc.As the material of this soft parts 162D, preference is as being the resin of PO, PVC etc.
Remain under second pressure status at contact 162C, even if soft parts 162D receives pin from a plurality of probe 12A and presses, contact 162C also can not descend and not remain on primary position to sensor part 162A one side, by a plurality of probe 12A with the needle tracking transcription above soft parts 162D.
Then, with reference to Fig. 3～Fig. 7, an embodiment of calibration steps of the present invention is described.
The calibration steps of present embodiment is to implement before the electrical characteristics of semiconductor wafer W are checked shown in Fig. 3 (a)～(c).In this calibration steps, at first use tip position detecting device 16 to carry out detection as a tip position operation, probe of calibration steps.When using the needle point height of sharp position detecting device 16 detector probe 12A, sensor mechanism 162 is set in first pressure.
At first, have under the state of semiconductor wafer W, use correcting mechanism 13 and tip position detecting device 16 to detect the tip position of a plurality of probe 12A of probe 12 in reception on the wafer chuck 11.Wherein, the last CCD camera 13A of correcting mechanism 13 by calibration bridge 13C to probe core, be probe 12 the center under move.Then, when wafer chuck 11 during moving below the calibration bridge 13C, tip position detecting device 16 makes sensor mechanism 162 rise to the direction shown in this figure (b) arrow from the holding state shown in Fig. 3 (a) by lift drive mechanism 161, be set in above the soft parts 162D on the contact 162C with wafer chuck 11 on the top identical horizontal level (level) that roughly is positioned at of semiconductor wafer W.
Then, wafer chuck 11 moves to X, Y direction, shown in Fig. 3 (c), under CCD camera 13A in the contact 162C arrival, then goes up the top height that CCD camera 13A detects soft parts 162D.After the height on detect soft parts 162D, confirm sensor mechanism 162 action, be the decline of the necessary contact 162C of detection of tip position, the hardness of soft parts 162D etc.After confirming sensor mechanism 162 regular events, carry out the detection of the tip position of a plurality of probe 12A.
When the detection of the tip position that carries out a plurality of probe 12A, shown in Fig. 4 (a), after if calibration bridge 13C temporarily keeps out of the way from position of readiness, wafer chuck 11 rises from the reference position of Z direction, then the soft parts 162D of tip position detecting device 16 is near a plurality of probe 12A, like that, soft parts 162D contacts with each probe 12A shown in Fig. 4 (b).
If wafer chuck 11 is risen, then contact 162C is pushed by a plurality of probe 12A via soft parts 162D and descends to sensor main body 162A one side.At this moment, contact 162C is kept by elasticity by first pressure, even if therefore effect has pin to press between a plurality of probe 12A and soft parts 162D, deflection can not take place in a plurality of probe 12A yet, a plurality of in addition probe 12A can not cause damage (needle point of a plurality of probe 12A not can transcription on soft parts 162D) to soft parts 162D yet, rising along with wafer chuck 11, contact 162C is only remaining under first pressure status to sensor part 162A side this rising part that descends, and the distance that shortens between both 162A, the 162C makes narrow gaps.
At this moment, the distance to sensor part 162A and contact 162C monitors that if cause the gap to change because of the decline of contact 162C, then sensor part 162A detects the distance in gap, sends these detection signals to control device 14.Thus, control part 14 compares the initial value in predefined gap and the detected value of sensor part 162A in arithmetic processing section 14A, according to till the moment below detected value becomes initial value, apart from the climb of the reference position of wafer chuck 11 try to achieve soft parts 162D above height, be the height of the tip position of a plurality of probe 12A in other words.Like this, because deflection does not take place a plurality of probe 12A, can not bring injury to soft parts 162D in addition, contact 162C begins to descend, so can detect the needle point height of the position of the beginning that descends as a plurality of probe 12A accurately.The needle point height of detected so a plurality of probe 12A is accommodated among the storage part 14B of control device 14 as the Z coordinate data.
Soft parts 162D forms homogeneous thickness as far as possible, as mentioned above, because this soft parts 162D is formed by synthetic resin, so there is deviation in its thickness, have boundary aspect the formation homogeneous thickness, in addition, the flatness after the needle tracking of cancellation probe 12A worsens.Moreover, for probe 12 in the near future, because along with the development of the superfine structure of semiconductor wafer W has trickle configuration structure, so have the tendency that is easy to damage.Therefore, even if the slight error of the tip position of probe 12A also is closely related with the damage of probe 12.
Therefore, shown in Fig. 4 (a) and (b), utilizing after tip position detecting device 16 detects the needle point height of probe 12A, further the needle point height of probe 12A is being detected by the following CCD camera 13B that is attached on the wafer chuck 11.At this moment, because the needle point height of probe 12A is detected by tip position detecting device 16, so, the focus of following CCD camera 13B with by tip position detecting device 16 detected height as target, search probe 12A thus, can detect probe 12A at an easy rate.
Promptly, shown in Fig. 4 (a), above the soft parts 162D on detecting the contact 162C of tip position detecting device 16 in advance after the height, make tip position detecting device 16 via wafer chuck 11 move to probe 12 under after, shown in figure (b), wafer chuck 11 is risen, detect the tip position of a plurality of probe 12A by soft parts 162D.Then, along continuous straight runs moves temporarily to make wafer chuck 11 descend also, detects probe 12A by following CCD camera 13B.At this moment, (x, y z), so focus by the focus that makes tip position and following CCD camera 13B, can detect probe 12A in short time because detected the tip position of probe 12A.Then, shown in figure (c), can detect the needle point height of a plurality of probe 12A accurately by utilizing down CCD camera 13B to detect the tip position of a plurality of (for example 4) probe 12A of registered in advance for example.
Then, temporary transient after the reference position of Z direction is returned at wafer chuck 11, the pressure that imposes on contact 162C is switched to second pressure from first pressure, wafer chuck 11 is risen once more like that and near after a plurality of probe 12A shown in the arrow among Fig. 5 (a), such as shown by arrows in figure (b), soft parts 162D is contacted with a plurality of probe 12A carry out overvoltage (overload) (overdrive).Even if wafer chuck 11 overvoltages, contact 162C also remains on second pressure and does not descend and remain on primary position to sensor part 162A side, therefore, shown in Fig. 6 (a), a plurality of probe 12A enter (thrusting) soft parts 162D, as figure (b) shown in, with needle tracking 162F transcription on soft parts 162D.
Wherein, method as formation needle tracking 162F on soft parts 162D, except that said method, also can be under the state of the needle point height that detects a plurality of probe 12A, by switch to second pressure from first pressure contact 162C is returned to primary position, thereby on soft parts 162D, form needle tracking 162F.
As mentioned above, with after needle tracking 162F transcription is on soft parts 162D, if wafer chuck 11 drops to the reference position, then go up CCD camera 13A via calibrating bridge 13C after the probe core turnover, wafer chuck 11 rises from the reference position, shown in Fig. 5 (c) and Fig. 6 (b), last CCD camera 13A detects a plurality of needle tracking 162F of soft parts 162D respectively.Thus, can detect a plurality of places of a plurality of probe 12A or detect whole XY positions as required, separately XY coordinate data is accommodated among the storage part 14B.The tip position that obtains a plurality of probe 12A by this continuous operation is the XYZ coordinate data, and it is provided in the calibration of semiconductor wafer W and a plurality of probe 12A.
When calibrating, wafer chuck 11 moves to X, Y direction, a plurality of places of last CCD camera 13A such as Fig. 5 (d) semiconductor wafer W that is shown in detect the corresponding electronic pads with a plurality of probe 12A, and the XY coordinate data of each electronic pads is accommodated among the storage part 14B.By this continued operation, finish the calibration of the electronic pads of a plurality of probe 12A and semiconductor wafer W.After calibration finished, wafer chuck 11 moved to the inspection starting position, rises on this position, as shown in Figure 7, a plurality of electronic padses of initial chip is contacted with a plurality of probe 12A corresponding with it, carries out the detection of electrical characteristics.Below, transmit semiconductor wafer W by wafer chuck 11 calibration (index), all chips of semiconductor wafer W are carried out the electrical characteristics inspection.
Present embodiment according to above explanation, be installed under the situation of tip position that tip position detecting device on the wafer chuck 11 detects a plurality of probe 12A in use, tip position detecting device 16 comprises: detect a plurality of probe 12A needle point sensor mechanism 162 and belong to this sensor mechanism 162 can lifting contact 162C, via wafer chuck 11, tip position detecting device 16 rises from the reference position of Z direction, soft parts 162D on the contact 162C contacts with the needle point of a plurality of probe 12A, further, rise by wafer chuck 11, deflection does not take place in a plurality of probe 12A and contact 162C descends to sensor part 162A side, the position that contact 162C is begun to descend detects as the tip position of a plurality of probe 12A, thus, can remain at the needle point of a plurality of probe 12A under the state of primary position and detecting the needle point height accurately.In addition, even if also can detect the needle point height reliably for the probe 12A of other any way.
And, after use tip position detecting device 16 detects the tip position of a plurality of probe 12A, further detect the tip position of these probes 12A by following camera 13B, carry out the calibration of these probes 12A and a plurality of electronic padses corresponding with it, therefore, can carry out the calibration of a plurality of probe 12A and the electronic pads corresponding accurately, thereby can when checking, make electronic pads come to check with the overvoltage of regulation reliably in the needle point height and position contact of a plurality of probe 12A accurately with it.Therefore, even if when probe 12 has trickle configuration structure along with the superfine structure of semiconductor wafer W, also can not damage probe 12, carry out the high inspection of reliability.
Contact with a plurality of probe 12A via soft parts 162D at contact 162C, contact 162C is when sensor part 162A side descends afterwards, a plurality of probe 12A can not damage soft parts 162D yet, therefore, when carrying out the detection of needle point height, the needle point height of a plurality of probe 12A does not change from primary position, can detect accurately.At this moment, because can detect the down maneuver of contact 162C, can detect the needle point height more accurately by sensor part 162A.
In addition, when calibrating, because the high high pressure of pressure when detecting than needle point remains on the primary position of contact 162C, so by a plurality of probe 12A are contacted with soft parts 162D, can be reliably with the needle tracking 162F transcription of whole probe 12A on soft parts 162D.Therefore, because can be to soft parts 162D with whole needle tracking 162F transcription of a plurality of probe 12A, so, can access a plurality of places or obtain the XY coordinate data of these probes 12A as required based on the needle tracking 162F of whole probe 12A, can be correctly calibrate, and can correctly make a plurality of places or whole probe 12A and the electronic pads corresponding with it are correctly contacted and carry out the high inspection of reliability with the XY coordinate data of corresponding electronic pads.In addition, when calibrating, because the needle point transcription of a plurality of probe 12A to soft parts 162D, so there is no need complicated algorithm, can reduce cost of software development.
In addition, in the probe unit 10 of first embodiment, the soft parts 162D of tip position detecting device 16 is formed by translucent synthetic resin.In addition, as mentioned above, there is deviation in the thickness of soft parts 162D, have boundary aspect the formation uniform thickness, in addition, the flatness after needle tracking is eliminated worsens, and, the possibility of the needle point of probe 12A to soft parts 162D bur (thrusting) when detecting, the needle point of probe 12A might take place.Therefore, the accuracy of detection of the tip position of probe 12A is low.
Therefore, in the probe unit of present embodiment, as shown in Figure 8, it is characterized in that, be divided into the cylinder mechanism of the soft parts (below, be called " transfer sheet " in the present embodiment) of the needle tracking of the cylinder mechanism of the needle point height that is used for detector probe 12A and transcription probe 12A.By being divided into needle point test section and needle tracking transcription portion, can go out the tip position of probe 12A with higher accuracy detection.
In the probe unit of present embodiment, as shown in Figure 8, comprising: the tip position detecting device 16A of the tip position of a plurality of probe 12A of detector probe card 12; With with tip position detecting device 16A in abutting connection with and the needle tracking transcription means 16B of the needle tracking of a plurality of probe 12A of transcription.It is identical with first embodiment that others constitute.
Tip position detecting device 16A comprises the lift drive mechanism 161 of cylinder etc. and via the sensor mechanism 162 of lift drive mechanism 161 liftings, remove following aspect, have the structure identical with first embodiment, that is, the pressure that constitutes all the time with regulation flexibly contacts with a plurality of probe 12A.That is, in the present embodiment, contact 162C is not soft parts above it, but the hard material that a plurality of probe 12A can not lunge.In addition, in the present embodiment, tip position detecting device 16A is constructed to be permeable to switch first pressure and second pressure as first embodiment, can only be set in the pressure that is equivalent to first pressure by the pressure applying unit but form.In addition, contact 162C has heating unit.
Therefore, at contact 162C with authorised pressure under the maintained state, via wafer chuck 11, tip position detecting device 16A rises with wafer chuck 11, even if this contact 162C contacts with a plurality of probe 12A, deflection can not take place in a plurality of probe 12A yet, under the state of the tip position at the initial stage that remains on a plurality of probe 12A, contact 162C descends to sensor part (scheming a not shown) side, and the position of the wafer chuck 11 that contact 162C begins to descend becomes the needle point height of probe 12A.
In addition, needle tracking transcription means 16B as shown in Figure 8, comprise: cylinder mechanism 161 ' and via the bar lifting of this cylinder mechanism 161C ' and have the contact 162C ' of soft parts 162D ', constitute contact 162C ' via cylinder mechanism 161 ' on than wafer chuck 11 low a little position of readiness and and wafer chuck 11 above lifting between the roughly the same height.Contact 162C ' when the position that arrives with roughly the same height above the wafer chuck 11, the needle tracking of a plurality of probe 12A of probe 12 by transcription on soft parts 162D '.Wherein, contact 162C ' is built-in with heating unit (scheming not shown).
Therefore, according to present embodiment, detect the needle point height of a plurality of probe 12A by tip position detecting device 16A, needle tracking by a plurality of probe 12A of needle tracking transcription means 16B transcription, therefore, can on the opaque contact 162C of tip position detecting device 16A, reliably and accurately detect the needle point height of a plurality of probe 12A by last CCD camera 13A, and a plurality of probe 12A can not enter (lunging) contact 162C, in addition, can be to the deviation of the thickness of soft parts yet, above concavo-convex exerting an influence, can detect the needle point height of a plurality of probe 12A accurately.
Employed tip position detecting device 26 in the probe unit for present embodiment, for example shown in Fig. 9 (a), the sensor part 27 that detects the needle point of a plurality of probe 12A constitutes main body.Sensor part 27 comprises: sensor part main body 271; Can be arranged on the contact 272 on the sensor part main body 271 up and down; With contact 272 is applied authorised pressure, make contact 272 and sensor part main body 271 separate the pressure applying unit (electronic controller (regulator)) 273 of predetermined distance.This contact 272 under authorised pressure by with the contacting of a plurality of probe 12A to sensor part 271 1 side shiftings, thus, detect the tip position of a plurality of those 12A of probe.In addition, sensor part main body 271 constitutes the resilient support mechanism (cylinder mechanism) that flexibly supports contact 272 by the pressure of regulation, constitutes and utilizes electronic controller 273 that the elastic force of cylinder mechanism is set in setting.Below, describe as cylinder mechanism 271 with sensor part main body 271.
Herein, cylinder mechanism 271 and electronic controller 273 are elaborated.Shown in Fig. 9 (a), cylinder mechanism 271 and electronic controller 273 connect by the first pipe arrangement 273A.This electronic controller 273 links via the first pipe arrangement 273A and the first air source 273B, supplies with pressurized air via electronic controller 273 to cylinder body 271 from the first air source 273B.Therefore, electronic controller 273 is supplied with in the cylinder body 274 of cylinder mechanism 271 from the first air source 273B, with the pressure of the air pressure settings in the cylinder body 274 in regulation.Cylinder mechanism 271 flexibly supports contact 272 under the pressure of setting by electronic controller 273.When cylinder mechanism 271 rises at wafer chuck 11, contact with a plurality of probe 12A, maintaining under the state of authorised pressure, even if contact 272 descends in cylinder body 274 via piston rod 275, also the pressurized air in the cylinder body 274 can be discharged from the vent port of electronic controller 273, the pressure in the cylinder body 274 are remained in the early stage set pressure.
In addition, cylinder mechanism 271 as mentioned above, comprise cylinder body 274 and in cylinder body 274 in specialized range along axially coming and going the piston rod 275 that moves.Cylinder body 274 has: the piston incorporating section 274A that takes in piston rod 275 that is formed at the bottom; With the bar incorporating section 274B that is formed at top, piston incorporating section 274A and bar incorporating section 274B are divided remaining under the airtight conditions (air seal state) by next door 274C.The central part of next door 274C is formed with through hole, and the reducing diameter part of piston rod 275 (diameter diminution part) connects this through hole.This piston rod 275 has piston portion 275A and the 275B of bar portion, connects by reducing diameter part.
Piston incorporating section 274A forms piston portion 275A can be along the size that axially moves in specialized range.The 275B of bar portion is incorporated in the 274B of bar incorporating section, and the mode that can not leak with air in fact in the 274B of bar incorporating section is along endwisely slipping.The reducing diameter part of piston rod 275 connects this through hole, and the mode that can not leak with air in the through hole of the aforesaid central part that is formed at next door 274C is slided.
The 275B of bar portion forms when piston portion 275A contacts with the bottom surface of piston incorporating section 274A, at least the upper surface length consistent with the upper surface of cylinder body 274, shown in Fig. 9 (a), as if top the contacting of piston portion 275A with its incorporating section 274A, then the 275B of bar portion is outstanding from the upper surface of cylinder body 274, and contact 272 separates with cylinder body 274.Between the bottom surface of the 275B of bar portion of bar incorporating section 274B and next door 274C, be formed with and supply with the compressed-air actuated driving that is used for piston rod 275 and use the space.Side at cylinder body 274 arrives the first through hole 274D that drives with the space along radially being formed with, and is connecting electronic controller 273 via the first pipe arrangement 273A on this first through hole 274D.
In addition, the first through hole 274D of cylinder body 274 a little below, along the second through hole 274E that radially is formed with at piston incorporating section 274A opening, this second through hole 274E is connected with the position detecting mechanism of the present position that is used to detect piston rod 275.Position detecting mechanism has flowmeter 276, the second pipe arrangement 276A and the second air source 276B, flowmeter 276 is connected with the second through hole 274E via the second pipe arrangement 276A, constitutes from the second through hole 274E via injection pressurized air above the piston portion 275A of nozzle (mensuration part) (scheming not shown) in the 274A of piston incorporating section.Flowmeter 276 bases are to the distance L between the top and mensuration part of the compressed-air actuated flow detection piston portion 275A that sprays above of piston portion 275A.That is, be and measure the relation that the distance L between part and the piston portion 275A increases and decreases pro rata, therefore,, then can obtain distance L accurately according to its flow as if determining compressed-air actuated flow by flowmeter 276 from the flow of measuring part compressed and supplied air.That is, the position detecting mechanism of present embodiment constitutes air micrometer (micrometer).Position detecting mechanism constitutes the present position of the piston rod 275 that monitors cylinder mechanism 271.
For example, if wafer chuck 11 rises, contact 272 contacts with a plurality of probe 12A and descends to cylinder mechanism 271, then the piston portion 275A of piston rod 275 top from the state shown in Fig. 9 (a) to beginning to move with the state shown in (b) the figure, along with away from measuring part, compressed-air actuated flow increases.The compressed-air actuated flow of this moment is measured by flowmeter 276, exports its measured signals from flowmeter 276 to control device 14.Registered in advance has the relation between compressed-air actuated flow and the distance L in control device 14.Be input to control device 14 if come from the measured signal of flowmeter 276, then control device 14 is tried to achieve distance L according to measured signal in arithmetic processing section 14A.In addition, for control device 14,, then will change the position that begins and detect as the tip position of a plurality of probe 12A if distance L changes.
In the present embodiment of above explanation, identical with first embodiment, can utilize tip position detecting device 16 to detect reliably.In addition, in the present embodiment, because contact 272 is top hard, so can be reliably and detect the tip position of a plurality of probe 12A accurately.
Wherein, the present invention is not subjected to any restriction of the respective embodiments described above, can suitably change each inscape as required.For example, in the above-described embodiment,, for example also can use long-term etc. the length meter of capacitive transducer or Laser Measuring as the sensor part of the displacement that detects contact,
In the probe unit that the present invention is preferably applied to the tested electrical characteristics of having a medical check-up of semiconductor wafer etc. are checked.
1. calibration steps is characterized in that:
This calibration steps tested on the mounting table that at every turn allows to move had a medical check-up and a plurality of probes electrically contact and carry out described tested electrical characteristics of having a medical check-up when checking, use can be configured in the top of described mounting table movably and to described tested first image unit of making a video recording of having a medical check-up, be installed on the described mounting table and second image unit that described probe is made a video recording and be installed on the described mounting table and the tip position detecting device that the needle point of described a plurality of probes detects is come described tested have a medical check-up and described a plurality of probe is calibrated, it comprises:
The A operation uses described tip position detecting device to detect the tip position of described a plurality of probes;
The B operation uses described second image unit that the tip position that utilizes the detected described a plurality of probes of described tip position detecting device is detected;
The C operation makes the soft parts that are installed on the described tip position detecting device contact with described a plurality of probes, with the needle tracking transcription of described a plurality of probes on described soft parts;
The D operation uses described first image unit that the needle tracking that is formed at the described a plurality of probes on the described soft parts is detected; With
The E operation uses pair described tested inspection of having a medical check-up corresponding with described a plurality of probes of described first image unit to detect with electrode,
Described tip position detecting device comprise the sensor part of the needle point that detects described a plurality of probes and belong to this sensor part can lifting contact,
Described A operation comprises:
First operation, described tip position detecting device moves via described mounting table, and the soft parts that are installed on the described contact are contacted with the needle point of described a plurality of probes;
Second operation by being moved further of described mounting table, makes described contact to described sensor part one side shifting in the mode that does not make described a plurality of probe generation deflections; With
The 3rd operation detects position that described contact begins the to move tip position as described a plurality of probes,
In described second operation, described a plurality of probes can not scratch described soft parts.
2. calibration steps as claimed in claim 1 is characterized in that:
In described second operation, utilize displacement transducer to detect the present position of described contact.
3. calibration steps as claimed in claim 2 is characterized in that:
In described the 3rd operation, detect the tip position of described a plurality of probes according to the testing result of described displacement transducer.
CN2009101336216A 2008-04-02 2009-04-02 Alignment method, tip position detecting device and probe apparatus CN101551231B (en)
JP2008-096646 2008-04-02
JP2008096646 2008-04-02
JP2008096646A JP5260119B2 (en) 2008-04-02 2008-04-02 Alignment method
CN201110233928.0A CN102426331B (en) 2008-04-02 2009-04-02 Tip position detecting device and probe unit
CN201110233928.0A Division CN102426331B (en) 2008-04-02 2009-04-02 Tip position detecting device and probe unit
CN101551231A CN101551231A (en) 2009-10-07
CN101551231B true CN101551231B (en) 2011-12-21
ID=41132664
CN2009101336216A CN101551231B (en) 2008-04-02 2009-04-02 Alignment method, tip position detecting device and probe apparatus
US (1) US7772862B2 (en)
JP (1) JP5260119B2 (en)
KR (1) KR101053014B1 (en)
CN (2) CN101551231B (en)
TW (1) TWI464817B (en)
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