CN1920674A - Manufacturing system in electronic devices - Google Patents

Abstract

The present invention relates to a laser beam machining equipment, a film-forming system, and a pattern-forming system of manufacturing system of electronic devices. A laser processing apparatus comprises a laser oscillator for producing a laser beam to selectively remove part of a substrate to be processed, a scanning system for applying the laser beam to an arbitrary position of the substrate and incident means for applying the laser beam to the substrate substantially at right angle.

Description

The manufacturing system of electronic installation

The application be that March 7, application number in 2002 are 02119009.7 the applying date, denomination of invention divides an application for the application of " manufacturing system of electronic installation ".

Technical field

The present invention relates to comprise that laser-processing system, film-forming system and the pattern of the electronic installation that is used to form semiconductor devices and so on form the system of processing of system.

Background technology

In lithography in the manufacturing of semiconductor devices (the claiming photoetching again) operation, on semiconductor wafer, carry out photoresist coating, exposure and development.In this lithography operation, need the contraposition of the pattern of the pattern on upper strata and lower floor to carry out pattern exposure.General exposure device is used in the exposure of pattern.

Has the registration mechanism that detects the lower pattern position in the exposure device.Contraposition mechanism comes the position of calculation exposure upper layer pattern by the alignment mark position of detecting the configuration lower pattern.Behind the lithography operation knot light beam, be the position deviation of the inspection ground floor and the second layer, and carry out involutory deviation check.Dispose contraposition deviation check mark by the contraposition deviation check.Contraposition deviation check device is measured the position of this contraposition deviation check mark.Alignment detection and contraposition differential location detect is generally undertaken by optical position detection device.Therefore alignment mark and the contraposition deviation check mark process processing procedure identical with SIC (semiconductor integrated circuit) form the low film of transparency sometimes on mark.Like this, when forming the low film of transparency on the mark, be difficult to discern the position of alignment mark and contraposition deviation check mark.Therefore, need to remove the low film of transparency that forms on the alignment mark.

But in the existing laser processing device, the opaque coating on the mark can not be correctly removed in appearance, is removed to the problem of not wanting the zone of removing.

In the above-mentioned lithography operation, the variation of the aligning accuracy during exposure becomes problem.The main reason that photoresist is this problem from the concavo-convex film forming asymmetricly of substrate.As the method that addresses this problem, Japanese patent laid-open 62-252136, spy open clear 63-117421, the spy opens in the flat 2-298017 communique and discloses by the scheme of Laser Processing as the photoresist film of light-sensitive surface.

But, (mainly be SiO by introducing chemically mechanical polishing (CMP) in recent years finished surface ₂) planarization solves the problems referred to above.Yet, when the formation photoresist film carries out patterning on this substrate, have the problem that produces the pattern variation along with standing wave.Standing wave is because the reflected light that the exposure light of outstanding photoresist film returns at the reflecting surface place of metal, polymerization silicon etc. by oxide film is interfered generation with incident light in photoresist film.Therefore, be the standing wave that prevents to produce in the photoresist film, use is used to suppress the antireflection film from the beneath reflection of exposure light below photoresist film.But by forming antireflection film, it is difficult that the observation of the needed alignment mark of pattern position information when detecting exposure on the processed substrate becomes.Being used for the alignment of the mask and the lens of alignment light, owing to there is antireflection film can not see fully that the problem of alignment mark has occurred through the light of installing for the high precision int of realizing the positional information detection that will expose.Removing the method for this antireflection film opens in the flat 2001-15407 communique open by Laser Processing the spy.

By the laser ablation organic membrane a lot of public technologies are arranged, as initially there being the Jap.P. spy to open that clear 62-252136, spy open clear 63-117421, the spy opens flat 2-298017 communique, also have the spy to open flat 5-3143, spy and open that flat 5-198496, spy open flat 7-161623, the spy opens flat 10-113779 communique, but any one in these all is that machined membrane direct irradiation laser is made the organic membrane gasification, but the foreign matter (the laser scaling loss residue of organic membrane) that produce this moment is dispersed in around the area to be machined, the bad problem of defective occurs producing.The heat that produces when adding Ministry of worker border and curling problem has also occurred by Laser Processing.

As mentioned above, in the laser processing device originally, can not correctly remove the opaque coating on the mark, be removed in the zone of not wanting to remove, when comprising organic membrane on the zone of alignment mark or inoranic membrane and removing by the energy-ray irradiation of laser, around removing the zone, scatter foreign matter, the bad problem of defective appears producing, so require a kind of system of processing, when processed substrate illumination laser is removed, in can only correctly removing the machined surface that removes regional laser processing device and processed substrate, can suppress near the damage of energy-ray irradiation area, reduce the generation of the flying of following the energy-ray irradiation.

Summary of the invention

A kind of laser processing device according to an embodiment of the invention is characterized in that comprising: the laser oscillator that sends the laser of a part of selectively removing the film that forms on processed substrate; The laser scanning irradiation system of the laser radiation that will send from laser oscillator to the optional position of above-mentioned processed substrate; And make the laser that sends from above-mentioned laser oscillator only to the injection device of going into of the straight incident of costal fold in the zone that must remove of above-mentioned processed substrate.

Film-forming system according to another embodiment of the invention comprises: the plummer that keeps the processed substrate more than 1; Provide the formation of filming that comprises solvent to come on above-mentioned interarea, to form the coating liquid film forming device of coating liquid film with soup to above-mentioned processed substrate interarea; The solvent that removal comprises in above-mentioned coating liquid film forms the coating film forming device of coating film; To above-mentioned interarea irradiation energy ray, selectively remove the laser processing device of a part of the above-mentioned at least coating film on above-mentioned surface from the energy exposure device; Connect above-mentioned plummer, coating liquid film forming device, coating film forming device and laser processing device and transport the conveyer that transports above-mentioned processed substrate.

Pattern according to still a further embodiment forms system, comprising: keep the plummer of the processed substrate more than 1, this processed substrate is included in the Semiconductor substrate that forms alignment mark on the interarea side; The first film that forms the first film on above-mentioned processed substrate interarea forms device; Provide the formation of filming that comprises emulsion and solvent to come on the first film, to form the coating liquid film forming device of coating liquid film with soup to above-mentioned interarea; The solvent that comprises in the above-mentioned first coating liquid film that removal is formed by above-mentioned coating liquid film forming device forms the coating film forming device of photosensitive film; To above-mentioned interarea irradiation energy ray, selectively remove the laser processing device of the part of above-mentioned at least photosensitive film on the above-mentioned processed substrate and the first film from the energy exposure device; Detect the alignment mark of above-mentioned interarea side and form device based on the positional information of detected alignment mark forms sub-image on above-mentioned photosensitive film sub-image; Effect corrosive liquid or etchant gas on the photosensitive film surface that forms above-mentioned sub-image, at least a portion of selectively removing this photosensitive film forms the photosensitive film pattern formation device of photosensitive film pattern; Connect above-mentioned plummer, coating liquid film forming device, coating film forming device and laser processing device and transport the conveyer that transports above-mentioned processed substrate.

The manufacture method of semiconductor devices according to still another embodiment of the invention comprises following operation: form the first film on the interarea of the Semiconductor substrate with alignment mark; Above-mentioned the first film on the zone that comprises above-mentioned alignment mark is shone first energy-ray, selectively remove the part of above-mentioned the first film; On above-mentioned the first film, provide the soup that comprises photoactive substance and solvent to form coating liquid film; Remove the solvent that comprises in the above-mentioned coating liquid film and form photosensitive film; Above-mentioned Semiconductor substrate immigration sub-image formation device and the zone through selectively removing above-mentioned the first film are discerned this mark position to above-mentioned alignment mark irradiation with reference to light; Shine second energy-ray based on the position of the above-mentioned alignment mark of discerning to the assigned position on the above-mentioned photosensitive film and on this photosensitive film, form sub-image; At least a portion of selectively removing above-mentioned the first film on above-mentioned photosensitive film based on the sub-image that forms forms the first film pattern.

According to the manufacture method that also has the semiconductor devices of an embodiment of the present invention, comprise following operation: on the interarea of Semiconductor substrate, form the first film with alignment mark; Above-mentioned the first film is provided the soup that comprises photonasty material and solvent and form coating liquid film on the first film; Remove the solvent that comprises in the above-mentioned coating liquid film and form photosensitive film; Above-mentioned photosensitive film on the zone that comprises above-mentioned alignment mark is shone first energy-ray, selectively remove the part of above-mentioned photosensitive film and the first film; The position of above-mentioned mark is discerned in zone through selectively removing the above-mentioned the first film in ground with reference to light to above-mentioned alignment mark irradiation; Shine second energy-ray based on the position of the above-mentioned alignment mark of discerning to the assigned position on the above-mentioned photosensitive film and on this photosensitive film, form sub-image; A part of selectively removing above-mentioned the first film based on the sub-image that forms on the above-mentioned photosensitive film forms the photosensitive film pattern, and when shining first energy-ray, the irradiation area to first energy-ray provides liquid at least.

The manufacture method of semiconductor devices according to another embodiment of the invention comprises following operation: provide the soup that comprises photoactive substance and solvent to form coating liquid film on the interarea of the Semiconductor substrate with alignment mark; Remove the solvent that comprises in the above-mentioned coating liquid film and on above-mentioned Semiconductor substrate, form photosensitive film; Above-mentioned photosensitive film on the zone that comprises above-mentioned alignment mark shines the part that first energy-ray is selectively removed above-mentioned photosensitive film; Above-mentioned Semiconductor substrate immigration sub-image formation device and the zone through selectively removing above-mentioned photosensitive film are discerned this mark position to above-mentioned alignment mark irradiation with reference to light; The assigned position of position on above-mentioned photosensitive film based on the alignment mark of discerning shines the next sub-image that forms of second energy-ray on photosensitive film; Selectively remove above-mentioned film based on the sub-image that forms on the above-mentioned photosensitive film and form Thinfilm pattern, when shining first energy-ray, the irradiation area to first energy-ray provides liquid at least.

Description of drawings

Fig. 1 is the figure that schematically shows the laser processing device of the first embodiment of the present invention;

Fig. 2 is the figure that schematically shows the laser processing device of the second embodiment of the present invention;

Fig. 3 is the figure that schematically shows the laser processing device of the third embodiment of the present invention;

Fig. 4 is the figure that schematically shows the laser processing device of the fourth embodiment of the present invention;

Fig. 5 schematically shows the abacus of laser processing device of the fourth embodiment of the present invention and the figure of hole switching mechanism;

Fig. 6 is the figure of hole rotating mechanism of the laser processing device of the explanation fourth embodiment of the present invention;

Fig. 7 is the figure that schematically shows the laser processing device of the fifth embodiment of the present invention;

Fig. 8 is the figure that schematically shows the laser processing device of the sixth embodiment of the present invention;

Fig. 9 is the schematic formation block scheme that the pattern of the expression seventh embodiment of the present invention forms system;

Figure 10 is the block diagram that the pattern of presentation graphs 9 forms the simple structure of variation of system;

Figure 11 schematically shows the hole of the optical element that uses the eighth embodiment of the present invention and the figure of hole rotating mechanism;

Figure 12 is the optical element of expression Figure 11 and the figure of beam shape of formation thus;

Figure 13 is the block diagram that schematically shows the pattern formation system of the ninth embodiment of the present invention;

Figure 14 is that the substrate conveyer of the expression tenth embodiment of the present invention transports the figure of the flow process of processed substrate;

Figure 15 A～15J is the figure that is used to illustrate the manufacturing process of the semiconductor devices that the tenth embodiment forms;

Figure 16 is the figure of the state of corrosion dielectric film in the manufacturing process of the semiconductor devices that forms in the tenth embodiment;

Figure 17 A～17I is the figure that is used to illustrate the manufacturing process of the semiconductor devices that the 11 embodiment forms;

Figure 18 is the block diagram that schematically shows the pattern formation system of the 12nd embodiment of the present invention;

Figure 19 is the block diagram that schematically shows the pattern formation system of the 13rd embodiment of the present invention;

Figure 20 A～20D is the figure that is used to illustrate the manufacturing process of the semiconductor devices that the 13 embodiment forms;

Figure 21 is the block diagram that schematically shows the pattern formation system of the 14th embodiment of the present invention;

Figure 22 A～22C is the figure that is used to illustrate the manufacturing process of the semiconductor devices that the 14 embodiment forms.

Embodiment

Below with reference to the description of drawings embodiments of the invention.

Fig. 1 schematically shows the laser processing device 100 of the first embodiment of the present invention.

This laser processing device 100 comprises at least: the cover 181 of the saddle 111 of processed substrate is loaded in laser oscillator 102, the saddle 111 that can load the processed substrate 110 of maintenance, encirclement.

The function that the soup that prevents to provide on processed substrate disperses is provided cover 181.The bottom of cover 181 is provided for discharging the floss hole 182 of soup 108.

The machined surface 110a that is provided with processed substrate 110 provides the soup of soup 108 that nozzle 183 is provided.The liquid that the soup that provides nozzle 183 to provide from soup uses when Laser Processing is arranged, solution that the volatility of using when removing this liquid is high, photoresist soup etc.Soup provides the piezoelectric element Drive and Control Circuit 171 that piezoelectric element 170 is set on the nozzle 183 and controls the driving of this piezoelectric element 170.

The soup in the laser radiation zone of the 110a of machined surface at least of 170 pairs of processed substrates 110 of piezoelectric element applies ultrasonic vibration, can remove the bubble that produces by laser radiation.

Can between processed substrate 110 and dividing plate 184, provide nozzle 183 by mobile soup, can on processed substrate interarea, can provide soup.Perhaps temporarily window 107a, soup are provided nozzle 183, piezoelectric element 170 to move to the substrate top.

The dividing plate 184 of laser-light transparent and window 107a had at least the function attached to processed substrate 110 surfaces such as splash of preventing the aproll function of soup 108 when the Laser Processing, preventing from self-information.

Soup 108 can be captured the heat that near the laser radiation the laser radiation zone produces in the machined surface 110a of processed substrate 110, and, can reduce the trend that produces evaporant by laser radiation.Can the actual aqueous solution of using pure water, ammonia in the soup.The laser radiation zone of the machined surface 110a of processed basically substrate 110 is impregnated in the soup.

Also comprise on this laser processing device 100: laser generation control module 103, optical system 104, the recording geometry 105 of control laser oscillator 102 and the scanning system 106 that between the machined surface of laser and processing object thing, relatively moves.

In this device, use Q-switch Nd YAG laser instrument on the laser oscillator 102.This laser oscillator 102 can shine the laser 102a of the arbitrary wavelength in basic wave (wavelength 1064nm), second harmonic (wavelength 532nm), third harmonic (wavelength 355nm), the four-time harmonic (wavelength 266nm).Be set in about 10nsec from the pulse width of the laser 102a of laser oscillator 102 irradiation, the laser radiation zone is adjusted in the length of side is the scope of 10 μ m～500 μ m (10 μ m * 10 μ m～500 μ m * 500 μ m) by not shown division mechanism.The laser oscillation frequency of processing oscillator 102 is set at 10kHz.The vibration control of the laser 102a of this laser oscillator 102, the control of irradiation area etc. are undertaken by laser generation control module 103.

Shine the machined surface of processed substrate 110 in proper order through optical system 104, recording geometry 105, scanning system 106 from the laser 102a of laser oscillator 102 irradiations.Recording geometry 105 comprises at least from optical axis takes out the half-reflecting mirror 105a of laser 102a and the observation camera 105b that the laser of this half-reflecting mirror 105a taking-up is passed through in observation.Use this recording geometry 105 can adjust the alignment of laser irradiating position.

Scanning system 106 is included among the machined surface 110a of processed substrate 110 or irradiation position or the scanning mirror 106a of continuous sweep laser 102a and the scan control section 106b of this scanning mirror of drive controlling 106a of mobile laser 102a at least.That is, in this laser processing device 100, can change the irradiation position of laser by the scanning mirror 106a of scanning system 106.And, between scanning mirror 106a and the processed substrate 110 convergent lens 120 being set, the machined surface 110a of processed substrate goes up approximate vertical incident laser 102a.

Processed substrate is by wafer rotating mechanism 121 rotations that are connected in saddle 111, and the rotation of processed substrate 110 is by sensor 122 and rotation control mechanism 123 control rotation angle.Among this embodiment, rotating mechanism is connected driving control device, in the horizontal direction with vertical direction on mobile clamper, make the irradiation position can change laser.

Among this embodiment,, can realize the miniaturization of convergent lens 120, reduce the anglec of rotation of scanning mirror 106a, can make the laser-processing system miniaturization by rotating mechanism.

Fig. 2 schematically shows the laser processing device of the second embodiment of the present invention.Among Fig. 2, to attached with identical symbol on the parts identical with Fig. 1, its explanation is omitted.

In the laser processing device 100 of this embodiment, processed substrate 110 is loaded on the saddle 111, and this saddle 111 can rotation in the clamper 107 of the liquid (soup) of storing the laser radiation zone of flooding its machined surface 110a.

The shape of the corresponding processed substrate that loads, the flat shape of clamper 107 can suitably change.For example, when loading the such discoid processed substrate of semiconductor wafer, can use the clamper of planar rondure shape.The quartz glass substrate that liquid crystal indicator uses, when loading the processing object thing of the such rectangular shape of printed wiring substrate, can use the clamper of planar rectangular shape.Certainly, can load the processed substrate of the such disc-shape of semiconductor wafer on the clamper of planar rectangular shape.

Clamper 107 also has the liquid that covers processed substrate and flood machined surface at least, to the window 107a of laser-light transparent.Shine on the machined surface 110a of processed substrate 110 through this window 107a, liquid 108 from the laser 102a of laser oscillator 102 vibrations.Window 107a has the function attached to processed substrate 110 surfaces such as function that prevents liquid 108 aproll when Laser Processing of storage in the clamper 107 and the splash that prevents from self-information at least.

Liquid 108 can be captured the heat that near the laser radiation the laser radiation zone produces in the machined surface 110a of processed substrate 110, and, can reduce the trend that produces evaporant by laser radiation.Can the actual aqueous solution of using pure water, ammonia in the liquid.The laser radiation zone of the machined surface 110a of processed basically substrate 110 is impregnated in the liquid, but is the trend of capturing heat more and further reducing evaporant, and processed substrate is whole to be immersed in the liquid.

This laser processing device 100 comprises makes the liquid 108 flowing liquid flow devices of storing in the clamper 107 109.Liquid flow device 109 is pump basically, is connected in clamper 107 by inflow pipe 109a and effuser 109b, makes fluid 108 circulations.Promptly, the mobile device 109 of fluid flows the liquid of storing in the clamper 107 108, the bubble that produces in the laser radiation zone by laser radiation with continuous removal, and do not produce irregular disorder in the laser for making can make liquid along certain orientation, circulate with certain flow rate.The mobile device 109 of fluid can be driven when carrying out Laser Processing at least.

And this device is included in the piezoelectric element Drive and Control Circuit 171 of piezoelectric element 170 that is provided with on the inside of clamper 107 and the driving of controlling this piezoelectric element 170.The liquid 108 in the laser radiation zone of the 110a of machined surface at least of 170 pairs of processed substrates 110 of piezoelectric element applies ultrasonic vibration, can remove the bubble that produces by laser radiation.

Fig. 3 schematically shows the laser processing device of the third embodiment of the present invention.Among Fig. 3, to attached with identical symbol on the parts identical with Fig. 2, its explanation is omitted.

That is, in the laser processing device 100 of this embodiment, processed substrate 110 directly loads, not rotation in the clamper 107 of the liquid of storing the laser radiation zone of flooding its machined surface 110a.

Clamper 107 can load at middle body and keep processed substrate, constitutes with the pallet shape that the dykes and dams of storing liquid partly are set around.Same with second embodiment, the shape of the corresponding processed substrate that loads, the flat shape of clamper 107 can suitably change.

In scanning system, do not use mirror, and be to use the optical beam scanner of acoustic optics elements such as having utilized the acoustic optics modulator element of using the acoustic optics effect and acoustic optics deflection element.Use the acoustic optics element in the scanning system, then compare with the mode that mechanically changes the processed substrate surface of mirror scanning direction, the size of scanning system reduces.For the scanning system of using the acoustic optics element, for example open in the flat 10-83002 communique on the books the spy.

Fig. 4 schematically shows the laser processing device of the fourth embodiment of the present invention.Among Fig. 4, attached with identical symbol on the parts identical with Fig. 2, its explanation is omitted.

That is, in the laser processing device 100 of this embodiment, be provided with and formed the abacus 124 that laser 102a is configured as a plurality of holes of prescribed level and shape.Abacus 124 may be exchanged for the hole of arbitrary form by hole switching mechanism 125.As shown in Figure 5, have on the abacus 124 and make each hole 124a, synchronously rotate 2 times hole rotating mechanism 124b with the rotation angle 1 of processed substrate 110.The rotation angle of this hole rotating mechanism 124b and the rotation angle of processed substrate 110 are synchronous.

About the reason of this hole of needs rotating mechanism 124b, use Fig. 6 A, the B explanation.On wafer chip, dispose alignment mark etc.As shown in Figure 6A, when for example making processed substrate 110 anglecs of rotation 1, the alignment mark 110b that form in each the chip 110a in the processed substrate 110 also rotate.Therefore, shown in Fig. 6 B, the rotation of corresponding processed substrate 110 (alignment mark 110b) if change the shape of the laser that makes 2 irradiations of the hole 124a anglec of rotation, then can be removed the film on the alignment mark 110b.About irradiation position, control from the mark coordinate of input in advance by scanning system 106 to mark.

Fig. 7 schematically shows the laser processing device of the fifth embodiment of the present invention.Among Fig. 7, attached with identical symbol on the parts identical with Fig. 2, its explanation is omitted.

That is, in the laser processing device 100 of this embodiment, behind abacus 124, be provided for amplifying the light beam lens optical system 128 that dwindles beam size.

Among the 4th embodiment, change the size and the shape of laser by the hole 124a that is provided with on the abacus 124.The number that can be arranged on the hole on the abacus 124 is limited, but among this embodiment, because the light beam lens optical system 128 of variable laser size is set, can increase the laser size that can form and the number of shape.

Fig. 8 schematically shows the laser processing device of the sixth embodiment of the present invention.Among Fig. 8, attached with identical symbol on the parts identical with Fig. 2, its explanation is omitted.

This device is expressed and is comprised the reflection or the optics (prism, catoptron etc.) of transmission laser, optical system 104, hole 124, recording geometry 105 are set in enclosure space 500, sweep away snow 106, convergent lens 120, is used for the N of self-cleaning system 501 ₂Structure etc. purged with purge gas enclosure space 500 inside.

Floating chemical contamination causes and the photochemical reaction of laser near the optical system, produces muddyly, and it is avoided muddy and pollutes to the optics cleaning protection among this embodiment.

As laser processing device, be not limited to the foregoing description.For example, as device for processed substrate approximate vertical incident laser, structure can be to penetrate the optical fiber input laser of light to the incident of processed substrate approximate vertical to it, and optical fiber is moved relative to processed substrate, with laser radiation on the optional position of processed substrate.

Pattern formation system to the above-mentioned laser processing device that comprises embodiments of the invention describes.

Fig. 9 schematically shows the block diagram that above-mentioned pattern forms system.

As shown in Figure 9, on the interarea of processed substrate, apply photoresist etc. with track 241.Behind the coating photoresist, by photoresist film and the dielectric film on the laser processing device 208 removal marks that are arranged on track 241 inside.Afterwards, by substrate transveyer 202 processed substrate being transported to exposure device 220 exposes.After the exposure, processed substrate is transported on the track 241, carries out the development treatment of photoresist film by transveyer 202.After the development treatment, processed substrate is transported to contraposition deviation check device 243, checks and formed the deviation of contraposition deviation check with the pattern of mark (reflecrtive mark) by transveyer 202.

Laser processing device 100, exposure device 220 and contraposition deviation check device 243 are connected by On-line Control portion 244 or at line interface.Like this, when laser processing device Laser Processing alignment mark and contraposition deviation check mark etc., calculating the mark coordinate time, obtain wafer chip coordinate, alignment mark position, contraposition deviation check mark position from exposure device 220 and contraposition deviation check device 243 online.Certainly, also can directly import on the laser processing device 100.

Shown in native system, load laser processing device 100 in the track 241, make and can realize photoresist coating, Laser Processing, the continuous operation of exposure, can shorten activity time.

As shown in figure 10, laser processing device 100 and track 241 can be disposed respectively.Among Figure 10, the device identical with Fig. 9 is attached with identical symbol, omits its detailed description.

Below, schematically show the hole and the hole rotating mechanism of the optical element that uses the eighth embodiment of the present invention.

Use on hole and the hole rotating mechanism will compare a plurality of micro-reflector two-dimensional arrangements that very little direction can more not change with the diameter of laser optical element (for example, Digital MicromirrovDevice, (digital micro-mirror device, the trade mark of Texas Instruments)).Optical element can form the optical image of any size and shape by the direction of controlling each micro-reflector.Therefore, the direction that constitutes each micro-reflector of this optical element by control can be shone the laser corresponding to the optical image of the size and Orientation of mark.

That is, as shown in figure 11, a plurality of micro-reflectors with incident laser 102a are arranged in the control part 152 of the rectangular optical element 150 and the direction of each micro-reflector of control arrangement.Micro-reflector 150 is by the direction to control micro-reflectors such as each micro-reflectors such as electric signal.

Shown in Figure 12 A～C, in this micro-reflector 150,, can form the beam-shaping shape 161a of hope, 161b, 161c by controlling the direction of each micro-reflector 151.

The rotation of beam-shaping shape and wafer is rotated synchronously, and as shown, by controlling the direction of each micro-reflector 151, rotatable beam-shaping shape has the function as hole and hole rotating mechanism.The beam-shaping of wishing in this micro-reflector 150 is not limited to rotation, can change the shape such as flexible that expands arbitrarily.

This optical element can use each micro-reflector of control and laser radiation be arrived the scanning system of the optional position of processed substrate.

Below, as the ninth embodiment of the present invention, illustrate that the pattern that has made up above-mentioned laser processing device forms system.

Figure 13 is the block diagram that the expression pattern forms an example of system.

Pattern forms system 20 and comprises film-forming system 200 and exposure device 220.Film-forming system 200 is connected in substrate transveyer 202 plummer 201 that can load the processed substrate more than 1.PEB (post exposure bake) operation of the 3rd substrate register Unit 209,3 of laser processing device Unit 100,1 of second removal of solvents device Unit 207,1 of the second substrate register 205 of the substrate transveyer 202 connections first substrate register 203, antireflection liquid medicine coating apparatus 204a, the first removal of solvents device 204b, Unit 1, photoresist liquid medicine coating apparatus Unit 206,2 of the spin coated type developing cell 211 of heating arrangement Unit 210,2.

In the film-forming system 200, say to narrow sense, in the inner part of surrounding of dotted line is film-forming system, and the PEB operation is structures that pattern forms system with heating arrangement 210, developing cell 211, but the PEB operation is included in the film-forming system with heating arrangement 210, developing cell 211.

Exposure device 220 constitutes respectively with film-forming system 200, is connected on the substrate transveyer 202.Exposure device 220 uses with ArF excimer laser (193nm) and is light source, through the projection aligner of exposure mask copy mask picture on substrate.

As the tenth embodiment of the present invention, use the formation method of semiconductor devices of above-mentioned film-forming system 200 and exposure device 220 as described below.

The flow process of the Semiconductor substrate that expression substrate transveyer 202 transports among Figure 14.Figure 15 A～G is the sectional view of the manufacturing process of explanation semiconductor devices.

Among this embodiment, illustrate after photoresist film forms and carry out Laser Processing that the liquid that uses is the situation of water when laser radiation.

At first, the support that holds the Semiconductor substrate 300 of 12 inches (φ 300mm) in the forming process of semiconductor devices is loaded on the plummer 201.Semiconductor substrate 300 is shown in Figure 15 A, and 40 alignment marks 302 of groove embedded set that form on Semiconductor substrate 301 and 20 unshowned quality of fits are measured mark.Form the pattern 303 of wiring etc. on the Semiconductor substrate 301, overlay pattern 303 forms the dielectric film 304 with flattening surface.By substrate transveyer 202 Semiconductor substrate 300 is transported to the first substrate register 203 from plummer 201.Semiconductor substrate 300 is adjusted to predetermined temperature with underlayer temperature in the first substrate register 203.The Semiconductor substrate 300 that temperature has been adjusted is transported among the antireflection liquid medicine coating apparatus 204a.

The dielectric film 304 that the soup that will comprise on one side antireflection film in antireflection liquid medicine coating apparatus 204a offers processed substrate interarea and be rotated makes the liquid film that forms the certain thickness that comprises anti-reflection material on the interarea of Semiconductor substrate on one side.The thickness of liquid film of this moment is 60nm, is about 10% with respect to the quantity of solvent of solid constituent.Then, shown in Figure 15 B, this Semiconductor substrate 300 is transported to the first removal of solvents device 204b, heating removes the residual solvent in the liquid film, forms the antireflection film 305 of thickness 56nm on dielectric film 304.Then, above-mentioned Semiconductor substrate 300 is transported in the second substrate register 205.

Then, in the second substrate register 205, the Semiconductor substrate of cooling off 300 is transported in the photoresist liquid medicine coating apparatus 206.It is the photoresist solvent of major component that the above-mentioned Semiconductor substrate of photoresist liquid medicine coating apparatus 206 rotations is dripped on antireflection film with the Solactol simultaneously, widens by centrifugal force, forms the uniform photoresist liquid film of 500nm.Then, shown in Figure 15 C, Semiconductor substrate 300 is moved to the second removal of solvents device 207 and heating, removes residual solvent in the photoresist liquid film, forms the photoresist film 306 of thickness 400nm.

Shown in Figure 15 D, the Semiconductor substrate 300 that forms photoresist film 306 from the teeth outwards is transported in the laser processing device 100.In the laser processing device 100 above-mentioned Semiconductor substrate is loaded on the saddle 111 in the clamper 107.The limit slowly rotates Semiconductor substrate 300 limits and stores pure water and offer the substrate interarea in clamper 107 by fluid flow arrangements 109.In addition, at this moment, apply ultrasound wave to liquid 108 by piezoelectric element 170.

Detect the otch (notch) of Semiconductor substrate 300 by recording geometry 105, coordinate identification roughly, the observation that is provided with on substrate surface compares with the regional registered image template that comprises the alignment mark of obtaining in advance with the image of camera (CCD camera) 105b, the position of the alignment mark on the identification substrate is based on this identifying information irradiating laser 102a.Carry out Laser Processing by the irradiation time about the 500msec in each place, remove alignment mark 302, the photoresist film 306 on the quality of fit mensuration labeling section and following antireflection film 305 thereof that exposure device 220 uses.Tied the whole mark of light beam with 50 seconds and process for whole of Semiconductor substrate 300.

The result of the photoresist film after the observation Laser Processing does not produce defectives such as cavity, dislocation, protuberance.And do not observe flying near the laser radiation zone yet.

This processing time is the short time in processing time that forms each piece of system than sub-image, is based on the predefined value of processing time that sub-image forms device.Be the laser output and the umber of pulse of each pulse of laser processing device to be done the time that self-adjusting result obtains for reaching this time.

The processing time of laser processing device 100 is shorter than the processing time that sub-image forms system, thereby sub-image forms before the processing knot light beam of system, can prepare the processed substrate that should newly handle to sub-image formation system, and turnout does not change like this.

Then, behind the water 108 that stores in discharging clamper 107, Semiconductor substrate 300 high speed rotating are removed the water on surface substantially.Afterwards, Semiconductor substrate 300 being transported to the second removal of solvents device 207 heats again.The heating-up temperature of Semiconductor substrate 300 is 200 degree.Here the heating of carrying out Semiconductor substrate 300 is in order to remove the planar water on photoresist film 306 surfaces, to make whole photoresist film face equally in the exposure environment.Do not carry out under the situation of this processing, in part that water contacts, because residual a little moisture, the acid that makes exposure produce is moved in film, produces the bad of pattern.

Then, use substrate transveyer 202 with this Semiconductor substrate 300 from film-forming system 200 by the online exposure device 220 that is transported to.

In the exposure device 220, at first shown in Figure 15 E, by the alignment mark 302 to bit detector detection Semiconductor substrate 300 of use with the alignment light 307 of the identical wavelength of exposure wavelength.At this moment, the antireflection film on the alignment mark 302 has been removed, and therefore obtains good detection intensity.As original, when not removing the antireflection film on the alignment mark 302, can not all detect alignment mark 302.

Based on the positional information of alignment mark, shown in Figure 15 F, the 306a of the exposure portion exposure to photoresist film 306 forms sub-image on photoresist film 306.After sub-image forms operation, Semiconductor substrate 300 is transported to the PEB operation with in the heating arrangement 210, carries out the heat treated (PEB) of Semiconductor substrate.Photoresist that heat treated is implemented to use (chemical enhancement type photoetching gum) and sour catalyst reaction.

After this heat treated, shown in Figure 15 G, transport Semiconductor substrate 300 to developing cell 211 and carry out the development of photoresist film 306, form photoresist pattern 309.The aligning accuracy of the photoresist pattern 309 that forms ± below the 5nm.

Then, regain substrate, be transported in the corrosion device 212 from pattern formation system, with photoresist pattern 309 as mask etch dielectric film 304.Here as shown in figure 16, be to observe alignment mark 302, the zone of removing photoresist film 306 and antireflection film 305 by Laser Processing in the operation of back, go wrong sometimes (corrosion mark, surface configuration variation etc.).When problem occurs like this, in the corrosion time before, shown in Figure 15 H, selectively cover the contraposition film behind the exposure process knot light beam with diaphragms such as organic membrane 310.Diaphragm 310 forms by selecting in the corrosion process of back selectively to be placed in the zone of removing photoresist film than high material.The coating of selecting is undertaken by falling soup from nozzle (for example entry needle).

Afterwards, shown in Figure 15 I, antireflection film 305 and dielectric film 304 order corrosion form groove.Subsequently, shown in Figure 15 J, remove diaphragm 310, photoresist pattern 309 and antireflection film 305.

As described above, in the present embodiment, working fluid in the laser radiation zone makes and can suppress near the damage in laser radiation zone, and can reduce the flying along with the irradiation generation of energy-ray.Laser processing device is arranged on pattern forms in system's (film-forming system), goods form the time of needs in the time of can suppressing Laser Processing.

And, forming system's (laser processing device of this moment is a film-forming system) with the pattern that is loaded in film forming, sub-image formation, development (corrosion) formation, can achieve the goal very effectively.

The action effect of this embodiment is provided with laser processing device in exposure device as the spy opens flat 7-161623 communique, be difficult to that mobile liquid offered the processing stand of processed substrate or handle after heat.On the other hand, when this laser processing device is provided with separately, only carry out Laser Processing with a batch processing as the spy opens flat 7-161623 communique, the time that goods formation needs has increased.

In the present embodiment, use the ArF projection aligner in the sub-image formation system, but be not limited to this.In the sub-image formation system, the ArF projection aligner certainly needless to say, can use the device with other exposure light sources, such sub-image such as expose electron ray exposure device, X ray exposure device, EUV (Extreme Ultra Violet, extreme ultraviolet) exposure device etc. to form device.

Shone laser for removing photoresist film and antireflection film, but except that laser, even if use the energy-ray of ion beam or electron ray etc. also can remove photoresist film and antireflection film.

Among this embodiment, during Laser Processing, apply ultrasound wave to pure water and use as liquid.Ultrasound wave is used to make foreign matter easily from substrate, film sur-face peeling.Use pure water, if the purpose that remove on oxygenolysis foreign matter limit, limit then can be used the oxidizing gas of ozone, oxygen etc. remarkablely.Removing under the situation of foreign matter easily, can not use ultrasound wave to apply (device).

Foreign matter easily attached to the photoresist film surface on the time, but the limit uses the hydrogeneous waterside dissolved hydrogen to carry out Laser Processing.Owing to be in the environment that other foreign matters peel off easily, can use dissolving hydrogen chloride etc. acidulous water, dissolved the alkaline water of ammonia etc. etc.

In addition, the liquid that uses during Laser Processing can make the organic solvent that surface with photoresist is not damaged.Organic solvent is drip-dry, if be not adsorbed on the photoresist surface, then can not carry out the heat treated of back operation.

Among the present invention,, form system's (exposure device), constitute from all transporting by one chip between the toning system of sub-image formation system (exposure device) by machinery from sub-image from film-forming system.But be not limited thereto, when exposure device and film-forming system are provided with respectively, transport or machinery transports and carries out also harmless with the batch form of several piece by manual betwixt.

The structure of laser processing device is not limited to illustrated device, can be the form that flow of liquid is carried out laser radiation simultaneously that produces on the machining area surface of Semiconductor substrate.

Among this embodiment, form antireflection liquid film and photoresist film (application of liquid film), drop on medicine liquid droplet on the processed substrate surface and the wire coating process of relatively move this substrate and this nozzle waits and forms from liquid nozzle but can use with whirl coating.Therefore at this moment, the quantity of solvent in the liquid film is very many, removes to substitute heating arrangement in the dissolving agent process and use reliever.At this moment, be exposed near the decompression state of saturated vapor pressure and remove solvent, also can heat.Heating arrangement is set in laser machine or the 3rd removal of solvents device is set in film-forming system, the heating after using them to carry out Laser Processing.

As the 11st embodiment of the present invention, to will be in pure water the liquid that uses during as laser radiation of the solution of the dissolved ozone example that removes antireflection film describe.

The structure of the film-forming system 200 that uses in the present embodiment is identical with the 9th embodiment, and therefore the manufacture process of semiconductor devices only is described.

Figure 17 A～17I represents the manufacturing process of the semiconductor devices of the 11st embodiment of the present invention.

At first, the Semiconductor substrate 300 of 12 inches in the forming process of semiconductor devices (φ 300mm) is loaded on the plummer 201.Above-mentioned Semiconductor substrate 300 is shown in Figure 17 A, and 40 alignment marks 302 of groove embedded set that form on Semiconductor substrate 301 and 20 unshowned quality of fits are measured mark.Form the pattern 303 of wiring etc. on the Semiconductor substrate 301, overlay pattern 303 forms the dielectric film 304 with flattening surface.By substrate transveyer 202 Semiconductor substrate 300 is transported from plummer 201.The Semiconductor substrate 300 that transports is inserted in the first substrate register 203, and underlayer temperature is adjusted to predetermined temperature.The Semiconductor substrate 300 that temperature has been adjusted is transported among the antireflection liquid medicine coating apparatus 204a.

The soup limit that will comprise antireflection film among the antireflection liquid medicine coating apparatus 204a offers the dielectric film 304 tops rotation substrate of its interarea, makes the liquid film that forms certain thickness on Semiconductor substrate 301.The thickness of liquid film of this moment is 60nm, is about 10% with respect to the quantity of solvent of solid constituent.

Then, shown in Figure 17 B, this Semiconductor substrate 300 is transported to the first removal of solvents device 204b, heating removes the residual solvent in the liquid film, forms the antireflection film 305 of thickness 56nm.Then, above-mentioned Semiconductor substrate 300 is transported in the second substrate register 205 and cooling.

The substrate that forms antireflection film on the interarea is transported to as in the above-mentioned laser processing device for example shown in Figure 1.

Then, shown in Figure 17 C, the limit slowly rotates substrate edge and will apply hyperacoustic liquid to the solution that dissolved ozone gas in pure water (below be called Ozone Water) and offer the substrate interarea.Ozone Water is very high to the transmissivity of laser, but consider the stability (focal position, Working position change) of Laser Processing, above Semiconductor substrate, be provided with and Semiconductor substrate quartz glass plate 107a abreast, provide Ozone Water 108 in the space that Semiconductor substrate and quartz plate constitute through the gap of 0.5mm.The otch that detects Semiconductor substrate 300 is coordinate identification roughly, and the observation that substrate is provided with above compares the mark on the identification substrate with the image of camera 105b and the regional registered image template that comprises the alignment mark of obtaining in advance.Then process antireflection film based on the identifying information irradiating laser of alignment mark.

By carrying out laser radiation about the 500msec in each place, remove 40 the alignment mark portions of sub-image formation system use and the antireflection film of 20 quality of fit mensuration marks.Tied the whole mark of light beam with 50 seconds and process for whole of substrate.This time is the short time in processing time that forms each piece of system than sub-image, is based on the predefined value of processing time that sub-image forms device.Be the laser output and the umber of pulse of each pulse of laser processing device to be done the time that self-adjusting result obtains for reaching this time.

Then, remove the Ozone Water 108 on the surface of Semiconductor substrate 300 substantially by high speed rotating, and be transported to the first removal of solvents device 204b.The heating-up temperature of Semiconductor substrate 300 is 200 degree.Here heat is in order to remove the planar water on antireflection film 305 surfaces, to make the exposure environmental facies together.Do not carry out under the situation of this processing, in part that water contacts, because residual a little moisture, the acid that makes exposure produce is moved in film, produces the bad of pattern.

Then, the Semiconductor substrate 300 of heating is transported to the second substrate register 205 and cooling after, the Semiconductor substrate 300 of cooling is transported to photoresist liquid medicine coating apparatus 206 places.Rotating Semiconductor substrate 300 in the photoresist liquid medicine coating apparatus 206 and dripping with the Solactol on antireflection film 305 is the photoresist solvent of major component, widens by centrifugal force, forms the uniform photoresist liquid film of 500nm.

Then, the Semiconductor substrate 300 that forms photoresist liquid film is from the teeth outwards moved to the second removal of solvents device 207 and heating, shown in Figure 17 D, remove residual solvent in the photoresist liquid film, form the photoresist film 306 of thickness 400nm.

Then use the substrate transveyer that Semiconductor substrate is transported to sub-image from film-forming system and form system, carry out transporting online.

In the exposure device 220, at first shown in Figure 17 E, by the alignment mark that used in 307 o'clock in alignment with the identical wavelength of exposure wavelength to bit detector detection Semiconductor substrate 300.At this moment, obtain good detection intensity.

Shown in Figure 17 F, based on the positional information that bit detector is measured, 306 exposures form the exposure 306a of portion to photoresist film.As original, when not removing the antireflection film on the alignment mark, can not all detect alignment mark (when pressure was carried out, the quality of fit of the photoresist pattern of the formation of developing in the back was ± 70nm almost can not make semiconductor devices).

After sub-image formed operation, the PEB operation that is transported to film-forming system 200 was carried out the heat treated of above-mentioned Semiconductor substrate 300 with in the heating arrangement 210.The photoresist (chemical enhancement type photoetching gum) that heat treated (PEB) enforcement is used and the catalyst reaction of acid.

After this heat treated, shown in Figure 17 G, be transported to developing cell 211, carry out the development of photoresist film 306, form photoresist pattern 309.Form the photoresist pattern 309 of quality of fit in ± hope below the 5nm.

Shown in Figure 17 H, photoresist pattern 309 as antireflection film 305 and dielectric film 304 below the mask etch, shown in Figure 17 I, is removed photoresist pattern 309 and antireflection film 305.

As described above, in the present embodiment, working fluid in the laser radiation zone makes and can suppress near the damage in laser radiation zone, and can reduce the flying along with the irradiation generation of energy-ray.Laser processing device is arranged on pattern forms in system's (film-forming system), goods form the time of needs in the time of can suppressing Laser Processing.

During Laser Processing, apply ultrasound wave to the solution that has dissolved ozone at pure water and use.The pure water purpose of using dissolved ozone is by the foreign matter on the ozone oxidation decomposition antireflection film.Same purpose can be used by oxidizing gas such as dissolved oxygen DO in pure water.

Foreign matter easily attached to the antireflection film surface on the time, but the limit uses the hydrogeneous waterside dissolved hydrogen in pure water to carry out Laser Processing.Owing to be in the environment that other foreign matters peel off easily, can use the alkaline water that dissolved ammonia etc. in the acidulous water, pure water of in pure water dissolving hydrogen chloride etc. etc.Ultrasound wave is used to make foreign matter easily from substrate and film sur-face peeling.

Use the ArF projection aligner in the present embodiment sub-image formation system, but be not limited to this.In the sub-image formation system, the ArF projection aligner can use the device with other exposure light sources, such sub-image such as expose electron ray exposure device, X ray exposure device, EUV exposure device etc. to form device from needless to say.

Among the present invention,, form system's (exposure device), constitute from all transporting by one chip between the toning system of sub-image formation system (exposure device) by machinery from sub-image from film-forming system.But be not limited thereto, when exposure device and film-forming system are provided with respectively, transport or machinery transports and carries out also harmless with the batch form of several piece by manual betwixt.

Figure 18 is that expression uses the pattern of the film-forming system 200 of the coating membrane formation device made up the 12nd embodiment of the present invention and laser processing device to form the block diagram of system.Among Figure 18, the device identical with Figure 13 is attached with same-sign, and its explanation is omitted.

In this film-forming system, photoresist liquid medicine coating apparatus and laser processing device as the device that separates among the 9th embodiment are changed to a device, and the photoresist liquid medicine coating apparatus 406 of band laser processor is set.This device 406 also uses the spin coated type.

Among this embodiment, form system, use KrF excimer laser (248nm) as exposure light source, through the projection aligner of exposure mask transcription map picture on substrate as sub-image.

Then, the manufacturing process of the semiconductor devices that uses system as shown in figure 18 is described, but, therefore omits the explanation of detailed manufacturing process, only the explanation operation relevant with the photoresist film coating with Laser Processing because manufacturing process is identical with the tenth embodiment.

After forming antireflection film on the processed substrate, processed substrate is being moved into band laser processor photoresist liquid medicine coating apparatus.For processed substrate, at first remove the soup operation that 40 sub-images form the antireflection film of alignment mark portion place that devices use and 20 quality of fit mensuration mark.

The chances are for band laser processor photoresist liquid medicine coating apparatus except that shown in Figure 1, and removable photoresist provides nozzle 183 between processed substrate 110 and dividing plate 184, provides the photoresist soup on processed substrate interarea.

At first, processed substrate is loaded on the saddle 111.Then configuration provides the nozzle that the solvent that uses in the photoresist solution is had deliquescent Solactol (one of solvent that comprises in the photoresist solution) solvent on substrate above substrate, and the limit rotates substrate edge at leisure and begins to provide soup.The thickness that Solactol has permeability for the optical maser wavelength 256nm for processing usefulness, and the gap of 0.2mm is set between the substrate surface and disposes quartz plate, flow to this space.The otch of detection substrate is coordinate identification roughly, the observation that is provided with on substrate compares with the regional registered image template that comprises the alignment mark of obtaining in advance with the image of camera 105b, discern the mark on the processed substrate, carry out Laser Processing based on this identifying information.By carrying out Laser Processing about each place 300msec, at whole of substrate with the whole mark processing of knot light beam in 30 seconds.

This time is the short time in processing time that forms each piece of device than sub-image, is based on the predefined value of processing time that sub-image forms device.Be the laser output and the umber of pulse of each pulse of laser processing device to be done the time that self-adjusting result obtains for reaching this time.

After the Laser Processing,, carry out that solvent is supplied with and the rotation of processed substrate on whole of processed substrate, providing the ethyl lactate solvent.In the part of supplying with the part of Solactol and not supplying with, the moisture-proof difference owing to the antireflection film of photoresist solution once was exposed to the whole face of substrate surface in the Solactol.After this, from the processed substrate surface Solactol that shakes, remove most of from processed substrate.

This processing has the character of the solvent that residual Laser Processing is used on processed substrate, carries out under the situation of influence coating characteristic in the photoresist coating process below.The solvent that uses during Laser Processing is drip-dry, when not changing on substrate surface, does not need to carry out above-mentioned processing.

After being included in, Solactol in the photoresist solution of coating, much less may be dissolved in the photoresist solution.Among this embodiment,, use the Solactol wherein comprise, but be not limited thereto, have with the solvent of the resolvability of photoresist solvent and all can as the solvent that is dissolved in the photoresist solvent.

On the processed substrate above the substrate interarea arrangement plan 1 unshowned photoresist solvent feedway, drippage is the photoresist solvent of major component with the Solactol, widens by revolving force, forms the uniform photoresist liquid film of 500nm.Then this substrate is transported in the second removal of solvents device 207, heats, remove residual solvent on the photoresist liquid film, form the photoresist film of 400nm thickness.

Sub-image formation, exposure and the corrosion process of operation afterwards is identical with following the tenth embodiment, therefore omits its explanation.

In the present embodiment, sub-image forms and uses the KrF projection aligner in the device, but is not limited to this.In the sub-image formation system, the KrF projection aligner can use the device with other exposure light sources, such sub-image such as expose electron ray exposure device, X ray exposure device, EUV exposure device etc. to form device from needless to say.

Laser processing device is included in the film formation device, but the mobile liquid that Laser Processing is used is as under the pure water situation, can be with its feed system and developing apparatus or corrosion device partial common.

Band laser processor photoresist liquid medicine coating apparatus 406 is not limited to device shown in Figure 1, so long as produce flow of liquid and carry out laser radiation on the machining area surface of processed substrate, which type of structure can.

Among this embodiment, make the application of liquid film with whirl coating, but can use traditional thread binding coating to make.At this moment,,, substitute heating arrangement, can use reliever for removing solvent because quantity of solvent is very many in the liquid film.In this case, be exposed near the decompression the saturated vapor pressure and remove solvent, heat and get final product.

Antireflection film is unnecessary to be this organic membrane of present embodiment, for example can be the SiN that forms by sputtering method and CVD method etc. _xO _yThe inoranic membrane of (x, y are ratio of componentss) and carbon and so on.

During to the photosensitive polyimide patterning of the superiors of semiconductor-fabricating device, be used for absorbing or attenuate light in the lithography operation,, also be difficult to observe the problem of alignment mark even if occur using common visible light with polyimide film.Certainly, will observe the light time as alignment mark, can not detect mark with the light of the identical wavelength of exposure light.

In the following examples, illustrate that the pattern of the coating, formation and the patterning that carry out the photosensitive polyimide film forms device.

Figure 19 is the block diagram that the pattern of the expression 13rd embodiment of the present invention forms system.Among the figure, attached on the device identical with identical symbol with Figure 13, and omit its detailed description.

As shown in figure 19, in the native system, have photosensitive polyimide liquid medicine coating apparatus 506 and removal of solvents device 507.In addition, also be included in after the photosensitive polyimide film forms, remove the laser processing device 100 of the photosensitive polyimide film on the zone that comprises alignment mark.

Then, use Figure 20 A-D explanation to use the formation and the patterning operation of the photosensitive polyimide of native system.

At first, the Semiconductor substrate prepare to form alignment mark 603 and pad 604 on the Si substrate 601 on interlayer dielectric 602 adds Semiconductor substrate on the plummer 201.Here, interlayer dielectric is to be the low dielectric film of major component, the low dielectric film that organic material constitutes or the dielectric film that forms on Semiconductor substrate such as silicon nitride film with silicon oxide film, the silicon oxide film that comprises methyl etc.

Use substrate transveyer 202 that the Semiconductor substrate in the plummer 201 is transported to photosensitive polyimide liquid medicine coating apparatus 506.On the interlayer dielectric 602 of the interarea of Semiconductor substrate, form the photosensitive polyimide liquid film in the photosensitive polyimide liquid medicine coating apparatus 506.Then, use transveyer 202 that Semiconductor substrate is transported to the removal of solvents device 507 from photosensitive polyimide liquid medicine coating apparatus 506.In removal of solvents device 507, the heating Semiconductor substrate makes the solvent evaporates in the liquid film, shown in Figure 20 A, forms photosensitive polyimide film 605.Then, use substrate transveyer 202 that Semiconductor substrate is transported to substrate register 508 from removal of solvents device 507, the cooling Semiconductor substrate.

Subsequently, use substrate transveyer 202 that Semiconductor substrate is transported to the laser processing device 100 from substrate register 508.Then pure water is provided and the photosensitive polyimide film is carried out Laser Processing to semiconductor substrate surface, shown in Figure 20 B, remove the photosensitive polyimide film 605 on the zone that comprises alignment mark 603 by the operation identical with the 11 embodiment.

As the laser oscillator that Laser Processing is used, can select any in the four-time harmonic, third harmonic, second harmonic of Q-switch YAG, the wavelength of higher harmonics is respectively 266nm, 355nm, 532nm.For material and polyimide thickness that polyimide lower floor is formed is optimal processing conditions, can select suitable wavelength.

Among this embodiment, use the wavelength of wavelength 355nm for the interlayer dielectric 602 of not processing lower floor's formation.The superiors of interlayer dielectric form under the situation of silicon nitride film, are not only polyimide for example being removed to, but under the situation of its silicon nitride film, use the wavelength of 266nm better.

The thickness of photosensitive polyimide film 605 is 3 microns, and the laser radiation energy density is each pulse 0.5J/cm ²0.5J/cm ²Energy exposure under process velocity be the about 0.3 micron/pulse of each pulse.But, in the face of influences such as the partial deviations of polyimide thickness or laser energy under the influence of unevenness process velocity approximately change ± about 20%.

Therefore, this device limit is used recording geometry 105 automatic observations whether to remove the polyimide limit and is implemented processing, by shining suitable gating pulse number in place and pulse energy and processing.

Use 0.5J/cm ²Irradiation energy when removing thick 3 microns polyimide, can remove polyimide on the mark with the umber of pulse of 10 pulses～15 pulses.And, in the laser processing device that does not have recording geometry 205, if the laser of irradiation 15 pulses can be removed Zone Full.

But, by recording geometry 105 being set and judging the mechanism of machining shape, gating pulse number and energy automatically, so unnecessaryly carry out useless irradiation, can improve the processing time sharp.

During this Laser Processing, apply the power of 40kHz, 50W in the laser radiation at least to piezoelectric element 270.Shown in Figure 20 B, do not observe dispersing of processing bits around Laser Processing zone and the machining area.Do not observe yet peel off, the irradiation damage of crackle etc.

Remove the photosensitive polyimide film 605 on the zone comprise alignment mark 603 by Laser Processing, use under the situation of the alignment mirror instrument (scope) that has utilized visible light, it is easy that mark is observed transfiguration, can be increased sharply yield rate rapidly briefly to bit-errors.In addition, the light that will expose when the alignment light, form polyimide after, with can not all to observe mark opposite, can be observed alignment mark by removal.

Then, use substrate transveyer 202 that Semiconductor substrate is transported to the removal of solvents device 507 from laser processing device 100.Subsequently, in removal of solvents device 507, the heating Semiconductor substrate makes dry tack free.Subsequently, using substrate transveyer 202 that Semiconductor substrate is transported to register 508 from the photosensitive polyimide membrane formation device cools off.Among this embodiment, the cooling medium during as Laser Processing use pure water, but under the situation of the solvent that uses diluent etc., do not need drying process.

Then, with substrate transveyer 202 Semiconductor substrate is transported to the exposure device 220 from register 508.In the exposure device 220 at first the wavelength by will be identical with exposure wavelength as alignment light 307 bit detector is detected alignment mark on the Semiconductor substrate.Then, based on photosensitive polyimide film 605 being exposed by the positional information that bit detector is measured.Use substrate transveyer 202 that Semiconductor substrate is transported to developing cell 211 from exposure device 220, shown in Figure 20 C, the photosensitive polyimide film 605 that exposes is developed, form the photosensitive polyimide film figure.

Then, Semiconductor substrate is transported in the corrosion device (RIE device) 212, shown in Figure 20 D, the photosensitive polyimide film figure is carried out the corrosion of interlayer dielectric 602 as mask, expose pad 604.

As above explanation, in the cooling liquid of pure water etc., the photosensitive polyimide film is carried out Laser Processing, remove the cooling liquid liquid that disperses, can improve in atmosphere processing, become problem read sum of errors to around the reduction of the yield rate that causes of the harmful effect that produces of patterning.

Polyimide on serving as a mark is removed by laser radiation, carries out the laser processing device that mark is observed easily, as the spy opens flat 10-113779, proposes to remove by laser radiation the device of polyimide in atmosphere.But in this motion, owing to be laser radiation in the atmosphere, the processing bits disperse around removing the zone and removing the zone, and mark reads error and increases, and to around patterning produce harmful effect, produce the problem that yield rate reduces.

Among the 13 embodiment, the operation of removing the polyimide on the mark is described.Among the 14 embodiment, illustrate that the method for using Laser Processing polyimide directly to implement the patterning that the pad opening becomes with the fuse window shape is connected in circuit and circuit here.

Figure 21 is the block diagram of brief configuration of the film-forming system of the expression 14th embodiment of the present invention.Device identical with Figure 19 among the figure is attached with identical symbol, and its explanation is omitted.

Owing to do not form photoresist film pattern, film-forming system shown in Figure 21 is different with pattern shown in Figure 19 formation system, does not have sub-image to form system, developing cell.As liquid medicine coating apparatus is polyimide liquid medicine coating apparatus 706.

Then, the manufacturing process of the semiconductor devices of the process profile explanation 14th embodiment of the present invention of use Figure 22 A-C.

At first, shown in Figure 22 A, prepare to form in the interlayer dielectric 602 on Si substrate 601 Semiconductor substrate of pad 604 and fuse 611.Then, be transported to polyimide liquid medicine coating apparatus 706 coating polyimide soups after, be transported to the removal of solvents device and remove solvent in the coated film, on interlayer dielectric 602, form polyimide film 612.At this moment, polyimide film 612 does not need the photosensitive polyimide that uses among the 13 embodiment.Therefore can use the polyimide that is dirt cheap.

Then Semiconductor substrate is transported to laser processing device shown in Figure 2, carries out Laser Processing.The laser that uses during Laser Processing is the third harmonic of Q-switch YAG, and wavelength is 355nm.

The thickness of polyimide film is 3 microns, and the laser radiation energy density is each pulse 0.5J/cm ²This device limit is used the automatic observation of recording geometry shown in Figure 2 whether to remove the polyimide limit and is implemented processing, by shining suitable gating pulse number in place and pulse energy and processing.

With the device of Fig. 2 remove on the pad 604 and the shape behind the polyimide film on the fuse 611 shown in Figure 22 B.At least in laser radiation, apply the power of 40kHz, 50W during this processing to piezoelectric element.

The alignment of this moment uses visible light to observe alignment mark, but alignment is observed difficulty when producing alignment errors, by can easily carrying out the observation of alignment mark by removing the polyimide on the alignment mark in advance like that shown in the embodiment of front.Shown in Figure 22 B, do not observe dispersing of processing bits around Laser Processing zone and the machining area.Do not observe yet peel off, the irradiation damage of crackle etc.

Then processed substrate is moved into the RIE device, polyimide film 612 is carried out the corrosion of interlayer dielectric 602 as mask, form the fuse window when exposing pad 604.

As shown in this embodiment, carry out Laser Processing in the liquid, can suppress to process in the generation and irradiation damage and processing mark of bits, on the pad and on polyimide.According to this mode, when finished semiconductor device product rate improves,, thereby the harmful effect of environment has been reduced owing to developing procedure, the soup operation that can remove in the lithography operation.

The present invention is not limited to the foregoing description, can carry out various distortion under the situation that does not deviate from its purport.

As above explanation according to the present invention, to the laser of processed substrate incident approximate vertical, can correctly only be removed removing the zone to removing in the zone in addition, zone by suppressing laser radiation.

By in liquid, carrying out Laser Processing, can suppress to process in the generation and irradiation damage and processing mark of bits, on the pad and the polyimide on the fuse.

The application of liquid film forming device and the coating film forming device that connect the coated film that is used to form photoresist film and sog film etc. in the laser processing device by transveyer, therefore the operation of Laser Processing can be carried out being formed into linearly, thereby the time when making can be shortened from coated film.

In addition, the application of liquid film forming device and the coating film forming device that connect the coated film that is used to form photoresist film and sog film etc. in the laser processing device by transveyer, therefore the operation of Laser Processing can be carried out being formed into linearly, thereby the time when making can be shortened from coated film.

Claims (10)

1. the manufacture method of a semiconductor devices is characterized in that comprising following operation:

On the interarea of Semiconductor substrate, form the first film with alignment mark;

Above-mentioned the first film is provided the soup that comprises photonasty material and solvent and form coating liquid film on the first film;

Remove the solvent that comprises in the above-mentioned coating liquid film, form photosensitive film;

Above-mentioned photosensitive film on the zone that comprises above-mentioned alignment mark is shone first energy-ray, selectively remove the part of above-mentioned photosensitive film and the first film;

Via the zone of selectively having removed above-mentioned the first film, with reference to light, discern the position of above-mentioned mark to above-mentioned alignment mark irradiation;

The assigned position of position on above-mentioned photosensitive film based on the above-mentioned alignment mark that identifies shines second energy-ray, forms sub-image on this photosensitive film;

A part of selectively removing above-mentioned the first film based on the sub-image that forms on the above-mentioned photosensitive film forms the photosensitive film pattern, wherein

When shining first energy-ray, the irradiation area to first energy-ray provides liquid at least.

2. the manufacture method of semiconductor devices according to claim 1 is characterized in that: in aforesaid liquid, use one that selects from pure water that permeability is arranged for first energy-ray and organic solvent.

3. the manufacture method of semiconductor devices according to claim 1, it is characterized in that: in aforesaid liquid, use one that selects in the oxidisability water, reductibility water, alkaline water, acidulous water of at least a gas from pure water, dissolved ozone, oxygen, hydrogen, ammonia, carbon dioxide, hydrogen chloride.

4. the manufacture method of semiconductor devices according to claim 1 is characterized in that: apply ultrasound wave to aforesaid liquid.

5. the manufacture method of semiconductor devices according to claim 1 is characterized in that: after selectively removing the part of above-mentioned the first film, heat above-mentioned Semiconductor substrate, remove liquid residual on the above-mentioned interarea.

6. the manufacture method of semiconductor devices according to claim 1 is characterized in that: above-mentioned photosensitive film is according to have one that absorption and attenuation characteristic are selected for second energy-ray.

7. the manufacture method of semiconductor devices according to claim 1 is characterized in that: above-mentioned the first film reduces the intensity of reflected light of above-mentioned second energy-ray of lower floor's reflection of above-mentioned photosensitive film.

8. the manufacture method of semiconductor devices according to claim 1 is characterized in that: above-mentioned light source use and the identical light source of above-mentioned second energy-ray with reference to light.

9. the manufacture method of semiconductor devices according to claim 1 is characterized in that: after forming sub-image on the above-mentioned photosensitive film, cover at least a portion in the zone of selectively having removed above-mentioned the first film.

10. the manufacture method of semiconductor devices according to claim 1 is characterized in that: removing the operation of solvent from the aforesaid liquid film, to above-mentioned Semiconductor substrate heating or decompression.

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