WO2014109116A1 - シンチレータパネルの製造方法、シンチレータパネル、及び放射線検出器 - Google Patents
シンチレータパネルの製造方法、シンチレータパネル、及び放射線検出器 Download PDFInfo
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- WO2014109116A1 WO2014109116A1 PCT/JP2013/079914 JP2013079914W WO2014109116A1 WO 2014109116 A1 WO2014109116 A1 WO 2014109116A1 JP 2013079914 W JP2013079914 W JP 2013079914W WO 2014109116 A1 WO2014109116 A1 WO 2014109116A1
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- scintillator
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- substrate
- convex portions
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- 230000005855 radiation Effects 0.000 title claims abstract description 31
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 27
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- 238000000034 method Methods 0.000 claims description 16
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 238000010408 sweeping Methods 0.000 abstract 1
- XQPRBTXUXXVTKB-UHFFFAOYSA-M caesium iodide Chemical compound [I-].[Cs+] XQPRBTXUXXVTKB-UHFFFAOYSA-M 0.000 description 7
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
- G01T1/16—Measuring radiation intensity
- G01T1/20—Measuring radiation intensity with scintillation detectors
- G01T1/202—Measuring radiation intensity with scintillation detectors the detector being a crystal
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21K—TECHNIQUES FOR HANDLING PARTICLES OR IONISING RADIATION NOT OTHERWISE PROVIDED FOR; IRRADIATION DEVICES; GAMMA RAY OR X-RAY MICROSCOPES
- G21K4/00—Conversion screens for the conversion of the spatial distribution of X-rays or particle radiation into visible images, e.g. fluoroscopic screens
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/14—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation
- H01L27/144—Devices controlled by radiation
- H01L27/146—Imager structures
- H01L27/14643—Photodiode arrays; MOS imagers
- H01L27/14658—X-ray, gamma-ray or corpuscular radiation imagers
- H01L27/14663—Indirect radiation imagers, e.g. using luminescent members
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/14—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation
- H01L27/144—Devices controlled by radiation
- H01L27/146—Imager structures
- H01L27/14683—Processes or apparatus peculiar to the manufacture or treatment of these devices or parts thereof
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/14—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation
- H01L27/144—Devices controlled by radiation
- H01L27/146—Imager structures
- H01L27/14683—Processes or apparatus peculiar to the manufacture or treatment of these devices or parts thereof
- H01L27/14685—Process for coatings or optical elements
Definitions
- One aspect of the present invention relates to a scintillator panel manufacturing method, a scintillator panel, and a radiation detector.
- Patent Document 1 includes a light detection panel in which a plurality of pixels are formed on a substrate, and a plurality of convex patterns are formed on each of the plurality of pixels on the light detection panel.
- a radiation detection device is described in which columnar crystals of scintillators are grown on the upper surface of the convex pattern.
- Patent Document 2 includes a plurality of pixel units arranged two-dimensionally, and each of these pixel units has a scintillator unit that converts X-rays incident from a predetermined input surface into light, and is adjacent to each other.
- An X-ray flat panel detector is described in which an interruption region where the scintillator portions are not continuous is provided between the scintillator portions in pixel units. This interruption region is formed by irradiating the scintillator layer with laser light to form a groove extending over the entire width of the scintillator layer.
- Patent Document 3 describes an X-ray imaging apparatus that includes a scintillator layer that is divided into optically independent pixels by grooves formed by laser ablation.
- the scintillator in order to improve the sensitivity characteristic of the scintillator panel, it may be required to increase the thickness of the scintillator.
- the columnar crystal of the scintillator has a property that its column diameter grows so as to be away from the base point of crystal growth, the scintillator is formed on the upper surface of the convex pattern as in the radiation detection apparatus described in Patent Document 1.
- adjacent scintillators may come into contact with each other as the scintillator film thickness increases.
- it is conceivable to increase the formation pitch of the convex pattern but in this case, the aperture ratio decreases.
- the processing range of the laser light incident portion is widened. Therefore, the scintillator layer may be lost beyond the required groove width, and the X-ray absorption performance may be deteriorated.
- One aspect of the present invention has been made in view of such circumstances, and provides a scintillator panel manufacturing method, a scintillator panel, and a radiation detector capable of increasing the thickness while suppressing deterioration of crystals. With the goal.
- a scintillator panel manufacturing method is a scintillator panel manufacturing method for converting radiation into scintillation light, on a surface of a substrate having a front surface and a back surface.
- the first step of forming a plurality of convex portions projecting in a predetermined direction from the back surface to the front surface and the concave portions defined by the convex portions, and by growing the columnar crystals of the scintillator material, the convexity of the substrate A second step of forming a first scintillator portion extending along a predetermined direction from each of the portions, and first scintillator portions extending from adjacent convex portions by scanning a laser beam along the concave portion
- a columnar crystal of scintillator material is grown to form a first scintillator portion extending from each of the convex portions of the substrate along a predetermined direction.
- the first scintillator portions are formed in a state where they are separated from each other at a predetermined height from the upper surface of the convex portion, and are in contact with each other on the concave portion above a predetermined height. It is formed. Therefore, by scanning the laser beam along the concave portion to irradiate the laser beam to the contact portion between the first scintillator units to separate the first scintillators from each other, the first scintillator unit having a thick film is formed.
- the first scintillator portion is separated, it is only necessary to irradiate only the contact portion with laser light, so that deterioration of the crystal can be suppressed. Furthermore, the groove width formed by laser processing can be prevented from becoming larger than the groove width necessary for crosstalk suppression.
- the method for manufacturing a scintillator panel may further include a fourth step of forming a second scintillator portion on the bottom surface of the concave portion of the substrate prior to the third step.
- the second scintillator portion formed on the bottom surface of the concave portion functions as a protective film, so that it is possible to prevent damage to wiring provided on the substrate when the laser beam is irradiated.
- the convex portions are formed so as to be arranged two-dimensionally on the surface of the substrate, thereby defining the lattice shape on the surface of the substrate.
- the thickness of the second scintillator portion in the intersecting region of the recesses can be made larger than the thickness of the second scintillator portion in the position excluding the intersecting region.
- the second scintillator portion having a relatively large thickness functions as a protective film in the intersecting region of the concave portions irradiated with the laser light twice when the laser light is scanned along the lattice-shaped concave portions. Therefore, it is possible to more reliably prevent damage to the wiring provided on the substrate.
- a scintillator panel is a scintillator panel for converting radiation into scintillation light, and has a front surface and a back surface, and a plurality of convex portions protruding from the surface in a predetermined direction from the back surface to the surface.
- first scintillator portions that extend along a predetermined direction from each of the convex portions and are separated from each other, and a first scintillator
- Each of the portions is formed by crystal growth of a plurality of columnar crystals on the convex portion, and the columnar crystals constituting the first scintillator portion are mutually connected by laser light irradiation at least at a part on the bottom surface of the concave portion. Fused.
- the range in which the plurality of columnar crystals are fused to each other is limited to at least a part on the bottom surface of the recess, so that there is little deterioration of the crystals.
- the scintillator panel according to one embodiment may further include a second scintillator portion formed on the bottom surface of the concave portion of the substrate.
- the second scintillator part formed on the bottom surface of the concave part functions as a protective film. Therefore, it is possible to prevent damage to the wiring provided on the substrate.
- the convex portions are two-dimensionally arranged on the surface of the substrate, and the concave portions are defined in a lattice shape by the convex portions on the surface of the substrate.
- the thickness of the second scintillator portion can be larger than the thickness of the second scintillator portion at a position excluding the intersecting region.
- At least a part of the second scintillator portion may be solidified after being melted by laser light irradiation.
- a radiation detector includes the above-described scintillator panel, and the substrate includes a plurality of photoelectric conversion elements arranged to be optically coupled to the first scintillator unit. . Since this radiation detector includes a scintillator panel capable of increasing the thickness while suppressing deterioration of crystals as described above, it is possible to improve characteristics such as MTF.
- the substrate is a sensor panel including a photoelectric conversion element, a convex portion can be directly formed on the photoelectric conversion element, and a scintillator portion can be formed on the convex portion. For this reason, it is not necessary to stick together the separately prepared scintillator panel and the sensor panel.
- a scintillator panel manufacturing method a scintillator panel, and a radiation detector that can be made thick while suppressing deterioration of crystals.
- FIG. 2 is a partial plan view of the scintillator panel shown in FIG. 1.
- FIG. 3 is a cross-sectional view taken along line III-III in FIG.
- FIG. 4 is a sectional view taken along line IV-IV in FIG. 2.
- It is sectional drawing which shows the manufacture procedure of the scintillator panel which concerns on one Embodiment.
- It is a partial top view which shows the manufacture procedure of the scintillator panel which concerns on one Embodiment.
- It is a partial top view which shows the manufacture procedure of the scintillator panel which concerns on one Embodiment.
- a scintillator panel according to the following embodiments is for converting incident radiation R such as X-rays into scintillation light such as visible light.
- incident radiation R such as X-rays
- FIG. 1 is a perspective view of a scintillator panel according to an embodiment of the present invention.
- FIG. 2 is a partial plan view of the scintillator panel shown in FIG.
- FIG. 3 is a sectional view taken along line III-III of the scintillator panel shown in FIG. 4 is a cross-sectional view taken along line IV-IV of the scintillator panel shown in FIG.
- the scintillator panel 1 includes a rectangular substrate 10.
- the substrate 10 has a front surface 10a and a back surface 10b facing each other.
- the substrate 10 has an uneven pattern Pa formed on the surface 10a.
- the material of the substrate 10 include metals such as Al and SUS (stainless steel), resin films such as polyimide, polyethylene terephthalate and polyethylene naphthalate, carbon materials such as amorphous carbon and carbon fiber reinforced plastic, and FOP (fiber optic).
- Plate An optical device in which many optical fibers having a diameter of several microns are bundled (for example, J5734 manufactured by Hamamatsu Photonics Co., Ltd.) can be used.
- a high aspect resist such as epoxy resin (KMPR, SU-8, etc. manufactured by Nippon Kayaku Co., Ltd.), silicon, glass, or the like can be used.
- the material of the convex portions constituting the concavo-convex pattern Pa can be a material that is transparent to scintillation light generated in the scintillator portion 20 described later.
- a sensor panel having a photoelectric conversion element can be attached to form a radiation detector.
- the concavo-convex pattern Pa can be made of the same scintillator material (for example, CsI (cesium iodide)) as the scintillator portion 20 described later.
- the concavo-convex pattern Pa is formed by a plurality of convex portions 11 and concave portions 12 defined by the convex portions 11. That is, a plurality of convex portions 11 and concave portions 12 are formed on the surface 10 a of the substrate 10.
- Each of the convex portions 11 has a front surface 10a along a predetermined direction (here, an incident direction of radiation R and a direction orthogonal to the front surface 10a and the back surface 10b of the substrate 10) from the back surface 10b of the substrate 10 to the front surface 10a. Protruding from.
- Each of the convex portions 11 is formed in a rectangular parallelepiped shape.
- the convex portions 11 are periodically arranged in a two-dimensional array on the surface 10 a of the substrate 10 along the X axis and the Y axis that are parallel to the substrate 10 and orthogonal to each other. Therefore, the concave portion 12 defined by the convex portion 11 is a groove having a rectangular lattice shape in plan view.
- a region where the region extending in the X-axis direction of the recess 12 and the region extending in the Y-axis direction intersect is referred to as a crossing region C.
- Each dimension of such a concavo-convex pattern Pa is, for example, such that when the pitch P of the convex portions 11 (the formation period of the convex portions 11) P is about 127 ⁇ m, the width (groove width) W of the concave portions 12 is about 45 to 200 ⁇ m.
- the width W of the concave portions 12 can be about 50 ⁇ m to 70 ⁇ m.
- the height H of the convex portion 11 can be about 2.5 ⁇ m to 50 ⁇ m.
- the pitch P of the convex portions 11 is about 200 ⁇ m
- the width W of the concave portions 12 is about 70 ⁇ m
- the height H of the convex portions 11 is about 15 ⁇ m.
- the scintillator panel 1 includes a plurality of scintillator portions (first scintillator portions) 20 formed on each of the convex portions 11, and scintillator portions (second scintillator portions) 30 and 30a formed in the concave portion 12. It has.
- the scintillator portions 20 are separated from each other (that is, the scintillator panel 1 has a separate scintillator portion).
- the scintillator section 20 can be formed of a scintillator material that forms columnar crystals such as CsI (cesium iodide).
- the height (scintillator film thickness) T of the scintillator section 20 can be set to, for example, about 100 ⁇ m to 600 ⁇ m.
- the scintillator 20 extends from each of the convex portions 11 along a predetermined direction and is separated from each other.
- the scintillator unit 20 has a first portion 21 and a second portion 22.
- the first portion 21 has a rectangular shape corresponding to the shape of the convex portion 11 in plan view.
- the second portion 22 has a rectangular ring shape so as to cover the side portion of the first portion 21 in plan view.
- the first portion 21 extends from the upper surface 11 a of the convex portion 11 along the incident direction of the radiation R (a direction substantially perpendicular to the substrate 10). More specifically, the first portion 21 is composed of a plurality of columnar crystals C1 of scintillator material formed by crystal growth from the upper surface 11a of the convex portion 11 along the incident direction of the radiation R.
- the second portion 22 extends from the side surface 11 b of the convex portion 11 along the incident direction of the radiation R and is in contact with the first portion 21.
- the second portion 22 is formed so as to protrude laterally from the side surface 11 b of the convex portion 11, and is located on the bottom surface of the concave portion 12.
- the second portion 22 is formed integrally with the first portion 21 (joined with the first portion 21). More specifically, the second portion 22 is in a direction (direction intersecting a predetermined direction) intersecting the incident direction (direction substantially perpendicular to the substrate 10) of the radiation R from the side surface 11b of the convex portion 11.
- the columnar crystal C2 is formed on the entire side surface 11b of the convex portion 11.
- the columnar crystal C ⁇ b> 1 constituting the first portion 21 has a taper shape whose diameter increases as the distance from the upper surface 11 a of the convex portion 11 increases. That is, the column diameter of the columnar crystal C1 increases as the distance from the upper surface 11a of the convex portion 11 increases (that is, from the base end portion on the upper surface 11a side to the distal end portion on the opposite side).
- the columnar crystal C ⁇ b> 2 constituting the second portion 22 has a tapered shape whose diameter increases as the distance from the side surface 11 b of the convex portion 11 increases. That is, the column diameter of the columnar crystal C2 increases as it moves away from the side surface 11b of the convex portion 11 (that is, from the base end portion on the side surface 11b side toward the tip end portion on the opposite side).
- the expansion ratio of the column diameter of the columnar crystal C2 is larger than the expansion ratio of the column diameter R1 of the columnar crystal C1. Therefore, for example, the column diameter of the columnar crystal C2 is relatively larger than the column diameter of the columnar crystal C1 at each tip.
- the height H of the convex part 11 mentioned above is larger than the column diameter in the base end part of the columnar crystal C1 which comprises the 1st part 21, and the columnar crystal C2 which comprises the 2nd part 22 at least. Therefore, a plurality of columnar crystals C1 or columnar crystals C2 are formed on the upper surface 11a or the side surface 11b of the convex portion 11.
- the second portion 22 has an upper portion 22a and a lower portion 22b.
- the upper portion 22a is a portion of the second portion 22 that constitutes the tip side with respect to the height T1 that is a midway position in the height direction of the scintillator portion 20.
- the lower part 22b is a part of the second part 22 that constitutes the base end side with respect to the height T1.
- a part of the tip side of the upper part 22a is a fused part 22c.
- the fused part 22c is a region formed by laser light irradiated to separate the plurality of scintillator parts 20 from each other, and is formed on the outer surface of the upper part 22a. In the scintillator portions 20 adjacent to each other, the fused portions 22c are separated from each other.
- the lower portions 22b of the scintillator portions 20 adjacent to each other are separated from each other.
- the fused portion 22c the plurality of columnar crystals C2 are fused together, and the columnar structure is broken.
- the tip of the columnar crystal C2 is crushed by the laser light irradiation.
- the plurality of scintillator portions 20 are separated from each other by the irradiation of the laser beam, and a gap S is formed between the adjacent scintillator portions 20.
- the gap S is defined by the scintillator portion 20 and the bottom surface of the recess 12 that are adjacent to each other.
- the gap S has a gap D1 between the upper parts 22a opposed via the gap S, and has a gap D2 wider than the gap D1 between the lower parts 22b opposed via the gap S.
- the gap S has a wedge shape in which the gap becomes wider toward the tip of the scintillator 20 at the laser light incident position A (position between the tips of the scintillator 20) A.
- the gap S as a whole has an hourglass shape in which the middle position in the height direction (position between the upper portions 22a facing each other via the gap S) is narrowed.
- the scintillator portions 30 and 30 a are formed in the recess 12, particularly on the bottom surface 12 a of the recess 12.
- the scintillator section 30 is formed in a region different from the region corresponding to the lattice point in the lattice-shaped recess 12 in plan view, that is, in a region excluding the intersecting region C of the recess 12.
- the scintillator portion 30 a is formed in the region corresponding to the lattice point in the lattice-shaped recess 12 in plan view, that is, in the intersecting region C of the recess 12.
- the scintillator portions 30 and 30 a are integrally formed over the entire recess 12.
- the height H1 of the scintillator portion 30 is formed to be lower than the height H of the convex portion 11. Further, the height H2 of the scintillator portion 30a is formed to be higher than the height H of the convex portion 11. That is, the thickness of the scintillator portion 30 a is formed larger than the thickness of the scintillator portion 30.
- the scintillator units 30 and 30a function as a protective film that protects the substrate 10 from laser light irradiation described later.
- the scintillator units 30 and 30a are composed of a plurality of columnar crystals of a scintillator material such as CsI, like the first portion 21 and the second portion 22 of the scintillator portion 20.
- Each columnar crystal constituting the scintillator portions 30 and 30a is formed by crystal growth from the bottom surface 12a of the recess 12 along the incident direction of the radiation R.
- the scintillator portion 30 has a convex shape (substantially triangular cross-section) that increases in thickness from the corner of the concave portion 12 (connection portion between the side surface 11b of the convex portion 11 and the bottom surface 12a of the concave portion 12) toward the center in the width direction of the concave portion 12. ).
- the scintillator portion 30a is thickest at the central point of the intersecting region C of the concave portion 12, and has a convex shape (substantially conical shape) that decreases in thickness away from the central point.
- the scintillator portions 30 and 30a may be in contact with the second portion 22 so as to support the columnar crystals C2 of the second portion 22 extending from the side surface 11b of the convex portion 11 from the bottom surface 12a side of the concave portion 12. .
- the column diameter of the columnar crystal in the portion in contact with the scintillator portion 30 in the second portion 22 is smaller than the column diameter R1 of the columnar crystal C1 in the first portion 21.
- the scintillator sections 30 and 30a may be solidified after part or all of the scintillator sections 30 and 30a are melted by irradiation with laser light.
- a method for manufacturing the scintillator panel 1 will be described with reference to FIGS.
- a plurality of convex portions 11 and concave portions 12 defined by the convex portions 11 are formed on the surface 10a of the substrate 10 (first step).
- a base material as a base of the substrate 10 is prepared, and as shown in FIG. 5, the material of the concavo-convex pattern Pa is formed on the base material by coating and drying.
- corrugated pattern Pa is formed in the base material by photolithography, and the board
- the protrusion 11 protrudes in a predetermined direction from the back surface 10b of the substrate 10 toward the front surface 10a (here, the incident direction of the radiation R and the direction orthogonal to the front surface 10a and the back surface 10b of the substrate 10).
- An uneven pattern Pa is formed. Further, by arranging the convex portions 11 in a two-dimensional manner along the X-axis direction and the Y-axis direction, concave portions having a rectangular lattice shape in plan view are formed as shown in FIG.
- the uneven pattern Pa may be formed on the substrate by screen printing.
- the columnar crystals C1 and C2 of the scintillator material such as CsI are crystal-grown, so that each of the convex portions 11 of the substrate 10 has a predetermined direction (here, the incident direction of the radiation R, And the scintillator part 40 extended along the surface 10a and the back surface 10b of the board
- substrate 10 is formed (2nd process).
- scintillator portions 30 and 30a are formed on the bottom surface 12a of the recess 12 of the substrate 10 by crystal growth (fourth step).
- the scintillator section 40 has a rectangular shape so as to cover a first portion 41 that has a rectangular shape corresponding to the shape of the convex portion 11 in plan view and a side portion of the first portion 21 in plan view. And a second portion 42.
- the scintillator portion 40 is a portion that will later become the scintillator portion 20 described above.
- the scintillator material is crystal-grown until the scintillator portion on the upper surface 11a of the convex portion 11 has a predetermined height (for example, 100 ⁇ m to 600 ⁇ m).
- a predetermined height for example, 100 ⁇ m to 600 ⁇ m.
- the scintillator portion 30 is formed in the recess 12 except for the intersecting region C.
- the scintillator portion 30a is formed in the recess 12 in the intersecting region C.
- the scintillator portion 30 a is formed thicker than the scintillator portion 30.
- the scintillator sections 30, 30a, 40 are formed by evaporating a scintillator material such as CsI on the substrate 10 by, for example, vacuum deposition.
- a scintillator material such as CsI
- vacuum deposition By controlling various vapor deposition conditions (vacuum degree, vapor deposition rate, substrate heating temperature, vapor flow angle, etc.), the scintillator portions 30, 30a, 40 as described above are formed on the concavo-convex pattern Pa.
- the scintillator sections 20, 30, 30a, 40 can also be formed using a vapor deposition method other than the vacuum evaporation method.
- FIG. 8 is a diagram illustrating a process of separating the scintillator unit 40 using the laser light L. As shown in FIG. 8, the laser beam L is scanned in the X-axis direction and the Y-axis direction along the contact portion 43 between the scintillator units 40 to thereby contact the scintillator units 40 extending from the adjacent convex portions 11. The portion 43 is irradiated with laser light L.
- the scintillator unit 20 is formed by irradiating the laser beam L and separating the plurality of scintillator units 40 from each other, and the scintillator panel 1 is manufactured.
- laser light L used here for example, laser light having a wavelength of 515 nm, a pulse width of 1 ps, and a repetition frequency of 20 kHz generated by second harmonic generation (SHG), a wavelength of 258 nm, and a pulse width
- SHG second harmonic generation
- a laser beam having a frequency of 1 ps and a repetition frequency of 20 kHz generated by fourth harmonic generation (SHG) can be used.
- the scintillator portions 20 formed by crystal growth can be separated from each other (that is, the scintillator portions are pixelated). Can be realized). Since the crystal growth is performed in a state where the lower portions 22b of the scintillator section 20 are separated from each other, only a part of the upper portions 22a of the scintillator sections 20 adjacent to each other is irradiated with the laser light when scanning with the laser light. Become.
- the scintillator portion 40 that extends along each of the convex portions 11 of the substrate 10 along a predetermined direction is obtained by growing columnar crystals of the scintillator material. Is forming. For this reason, the scintillator 40 is formed in a state of being separated from each other at a predetermined height with the upper surface 11a of the convex portion 11 as a base point, and is formed in a state of being in contact with each other on the recess 12 above a predetermined height. Is done.
- the thickened scintillator unit 20 is formed. Is obtained. Further, when the scintillator portion 40 is separated, only the contact portion 43 should be irradiated with laser light, so that deterioration of the crystal can be suppressed.
- the scintillator portion 30 formed on the bottom surface 12a of the recess 12 functions as a protective film. Therefore, when the substrate 10 is a sensor panel, for example, the laser beam L Can be prevented from being damaged on the sensor panel.
- the laser beam L when the laser beam L is scanned along the lattice-shaped recess 12, the crossing region C of the recess 12 irradiated with the laser beam L twice is relatively
- the scintillator portion 30a having a large thickness functions as a protective film, it is possible to more reliably prevent damage to wiring or the like provided on the substrate (sensor panel) 10.
- one aspect of the present invention is not limited to the scintillator panels 1 to 1C described above.
- the above-described scintillator panel 1 can be arbitrarily changed or applied to other ones without changing the gist of each claim.
- the radiation detector includes any of the scintillator panels 1 described above, and includes a plurality of photoelectric conversion elements arranged so that the substrates 10 are optically coupled to the scintillator unit 20.
- a sensor panel TFT panel or CMOS image sensor panel
- each of the convex portions 11 is made of a material having transparency to scintillation light generated in the scintillator portion 20.
- the scintillator panel 1 described above since the scintillator panel 1 described above is provided, the characteristics can be improved.
- the substrate 10 is a sensor panel including a photoelectric conversion element, if the scintillator unit 20 is provided by forming the convex portion 11 directly on the photoelectric conversion element, a separately prepared scintillator panel and sensor panel are provided. There is no need to stick them together.
- SYMBOLS 1 ... Scintillator panel, 10 ... Board
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Abstract
Description
Claims (8)
- 放射線をシンチレーション光に変換するためのシンチレータパネルの製造方法であって、
表面及び裏面を有する基板の前記表面上に、前記裏面から前記表面に向かう所定の方向に突出する複数の凸部と、前記凸部によって規定される凹部とを形成する第1の工程と、
シンチレータ材料の柱状結晶を結晶成長させることにより、前記基板の前記凸部のそれぞれから前記所定の方向に沿って延びる第1のシンチレータ部を形成する第2の工程と、
前記凹部に沿ってレーザ光を走査することによって、互いに隣接する前記凸部から延びる前記第1のシンチレータ部同士の接触部分に前記レーザ光を照射し、互いに隣接する前記凸部から延びる前記第1のシンチレータ部同士を互いに分離する第3の工程と、
を含む、シンチレータパネルの製造方法。 - 前記第3の工程よりも前に、前記基板の前記凹部の底面上に第2のシンチレータ部を形成する第4の工程を更に含む、請求項1に記載のシンチレータパネルの製造方法。
- 前記第1の工程においては、前記基板の前記表面上に二次元状に配列されるように前記凸部を形成することによって、前記基板の前記表面上に格子状に規定される前記凹部を形成し、
前記第4の工程においては、前記凹部の交差領域における前記第2のシンチレータ部の厚さを、前記交差領域を除く位置における前記第2のシンチレータ部の厚さよりも大きくする、請求項2に記載のシンチレータパネルの製造方法。 - 放射線をシンチレーション光に変換するためのシンチレータパネルであって、
表面及び裏面を有すると共に、前記裏面から前記表面に向かう所定の方向に前記表面から突出する複数の凸部と、前記凸部によって規定される凹部とが形成された基板と、
前記凸部のそれぞれから前記所定の方向に沿って延びると共に、互いに分離した複数の第1のシンチレータ部と、を備え、
前記第1のシンチレータ部は、それぞれ、前記凸部上に複数の柱状結晶を結晶成長させることにより形成され、
前記第1のシンチレータ部を構成する前記柱状結晶は、前記凹部の底面上の少なくとも一部において、レーザ光の照射により互いに融着している、
シンチレータパネル。 - 前記基板の前記凹部の前記底面上に形成された第2のシンチレータ部を更に備える、請求項4に記載のシンチレータパネル。
- 前記凸部は、前記基板の前記表面上に二次元状に配列されており、
前記凹部は前記基板の前記表面上において前記凸部によって格子状に規定されており、
前記凹部の交差領域における前記第2のシンチレータ部の厚さは、前記交差領域を除く位置における前記第2のシンチレータ部の厚さよりも大きい、請求項5に記載のシンチレータパネル。 - 前記第2のシンチレータ部の少なくとも一部は、前記レーザ光の照射により溶融した後に固形化している、請求項5又は6に記載のシンチレータパネル。
- 請求項4~7のいずれか一項に記載のシンチレータパネルを備え、
前記基板は、前記第1のシンチレータ部に光学的に結合されるように配列された複数の光電変換素子を有するセンサパネルである、
放射線検出器。
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CN201380070006.XA CN104903971B (zh) | 2013-01-09 | 2013-11-05 | 闪烁器面板的制造方法、闪烁器面板以及放射线检测器 |
EP17175327.0A EP3240031B1 (en) | 2013-01-09 | 2013-11-05 | Scintillator panel and radiation detector |
KR1020157018040A KR102059230B1 (ko) | 2013-01-09 | 2013-11-05 | 신틸레이터 패널의 제조 방법, 신틸레이터 패널 및 방사선 검출기 |
EP13871088.4A EP2945166B1 (en) | 2013-01-09 | 2013-11-05 | Method of manufacturing a scintillator panel and a radiation detector |
US14/759,739 US9405020B2 (en) | 2013-01-09 | 2013-11-05 | Scintillator panel manufacturing method, scintillator panel, and radiation detector |
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2547908B2 (ja) | 1991-10-02 | 1996-10-30 | 浜松ホトニクス株式会社 | 放射線検出装置 |
JP2001059899A (ja) * | 1999-08-24 | 2001-03-06 | Matsushita Electric Ind Co Ltd | X線蛍光体製作方法及びx線蛍光体形成用基板 |
JP2003167060A (ja) | 2001-11-30 | 2003-06-13 | Toshiba Corp | X線平面検出器 |
US20040042585A1 (en) * | 2002-08-27 | 2004-03-04 | Nagarkar Vivek V. | Pixellated micro-columnar film scintillator |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2547908Y2 (ja) | 1990-08-08 | 1997-09-17 | 株式会社シライ | ハンガー |
US5229613A (en) * | 1991-09-06 | 1993-07-20 | Horiba Instruments, Incorporated | Extended lifetime scintillation camera plate assembly |
JPH09325185A (ja) * | 1996-06-03 | 1997-12-16 | Toshiba Fa Syst Eng Kk | 放射線検出器とその製造方法と透視検査装置とctスキャナ |
CN1333421C (zh) * | 2001-08-29 | 2007-08-22 | 株式会社东芝 | X射线图像检测器的制造方法和制造装置及x射线图像检测器 |
JP2004108806A (ja) * | 2002-09-13 | 2004-04-08 | Fuji Photo Film Co Ltd | 放射線像変換パネル |
JP4498283B2 (ja) * | 2006-01-30 | 2010-07-07 | キヤノン株式会社 | 撮像装置、放射線撮像装置及びこれらの製造方法 |
JP2011017683A (ja) * | 2009-07-10 | 2011-01-27 | Fujifilm Corp | 放射線画像検出器及びその製造方法 |
JP2012154696A (ja) * | 2011-01-24 | 2012-08-16 | Canon Inc | シンチレータパネル、放射線検出装置およびそれらの製造方法 |
JP2012154811A (ja) * | 2011-01-26 | 2012-08-16 | Canon Inc | シンチレータパネルおよびその製造方法ならびに放射線検出装置 |
JP2013050364A (ja) * | 2011-08-30 | 2013-03-14 | Fujifilm Corp | 放射線画像検出装置 |
JP6018854B2 (ja) * | 2012-09-14 | 2016-11-02 | 浜松ホトニクス株式会社 | シンチレータパネル、及び、放射線検出器 |
JP6032236B2 (ja) * | 2014-04-08 | 2016-11-24 | トヨタ自動車株式会社 | レーザ溶接方法および溶接構造 |
-
2013
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Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2547908B2 (ja) | 1991-10-02 | 1996-10-30 | 浜松ホトニクス株式会社 | 放射線検出装置 |
JP2001059899A (ja) * | 1999-08-24 | 2001-03-06 | Matsushita Electric Ind Co Ltd | X線蛍光体製作方法及びx線蛍光体形成用基板 |
JP2003167060A (ja) | 2001-11-30 | 2003-06-13 | Toshiba Corp | X線平面検出器 |
US20040042585A1 (en) * | 2002-08-27 | 2004-03-04 | Nagarkar Vivek V. | Pixellated micro-columnar film scintillator |
US6921909B2 (en) | 2002-08-27 | 2005-07-26 | Radiation Monitoring Devices, Inc. | Pixellated micro-columnar films scintillator |
Non-Patent Citations (1)
Title |
---|
See also references of EP2945166A4 * |
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