CN105988132A - X-ray detector and packaging method thereof - Google Patents
X-ray detector and packaging method thereof Download PDFInfo
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- CN105988132A CN105988132A CN201510082280.XA CN201510082280A CN105988132A CN 105988132 A CN105988132 A CN 105988132A CN 201510082280 A CN201510082280 A CN 201510082280A CN 105988132 A CN105988132 A CN 105988132A
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- silicon photomultiplier
- scintillation crystal
- ray detector
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Abstract
The invention discloses an X-ray detector and a packaging method thereof. The X-ray detector comprises an LYSO scintillation crystal and a silicon photomultiplier chip. The LYSO scintillation crystal having a cuboid-shape structure has a square front end surface and a square rear end surface; and the silicon photomultiplier chip has a square shape. The rear end surface of the LYSO scintillation crystal is in contact with the surface of the silicon photomultiplier chip; and a plurality of pins at the back of the silicon photomultiplier chip are led out by leads. Other surfaces, except the rear end surface, of the LYSO scintillation crystal are packaged by using aluminum foils. The LYSO scintillation crystal and the silicon photomultiplier chip are packaged by using thermal-shrinkage plastic pipes. According to the invention, optical coupling packaging of the LYSO scintillation crystal detector and the silicon photomultiplier is realized and thus mechanical fixation and photon coupling of the LYSO scintillation crystal detector and the silicon photomultiplier is realized. Meanwhile, beneficial effects of internal and external photon isolation and external light shielding are realized.
Description
Technical field
The present invention relates to X-ray detection technical field, especially a kind of X-ray detector and envelope thereof
Dress method.
Background technology
In the scintillation detector being applied to X-ray detection, yttrium luetcium silicate (LYSO) scintillation crystal
Having a high luminous intensity, response is fast, is difficult to deliquescence it is considered to be the best Inorganic scintillation of combination property
Crystal.In the electrooptical device adaptive with flash detection, silicon photomultiplier (Silicon
Photomultiplier, SiPM or Multi-pixel Photon Counter, MPPC) there is gain height,
Volume is little, and running voltage is low, and the insensitive feature of electromagnetism is it is considered to be the development of following photomultiplier tube
Direction.
Owing to detector physical characteristic determines the necessary strict separation of inside and outside photon, and silicon photomultiplier transit
Must be closely coupled with LYSO scintillation crystal rear end face, this directly determines the detection performance of detector,
So, the most how LYSO scintillation crystal detectors is packaged together with silicon photomultiplier,
Constitute the complete integral compact ray detector with good X-ray detection ability, be industry
Need the technical barrier of solution badly.
Summary of the invention
(1) to solve the technical problem that
In view of this, a kind of X-ray detector of offer and encapsulation side thereof are provided
Method, to realize the optical coupling encapsulation of LYSO scintillation crystal detectors and silicon photomultiplier, and then both
Realize both be mechanically fixed to couple with photon, there is again the isolation of inside and outside photon, to external world optical screen simultaneously
The beneficial effect covered.
(2) technical scheme
For reaching above-mentioned purpose, the invention provides a kind of X-ray detector, this X-ray detection
Device includes LYSO scintillation crystal and two parts of silicon photomultiplier chip, wherein LYSO flicker crystalline substance
Body is that front/rear end is foursquare cuboid, and silicon photomultiplier chip is square, LYSO
The surface of scintillation crystal rear end face and silicon photomultiplier chip is close to, silicon photomultiplier chip back
Multiple pins drawn by wire；LYSO scintillation crystal other surfaces in addition to rear end face are all adopted
It is packaged with aluminium foil；LYSO scintillation crystal and the overall employing of silicon photomultiplier chip two part
Thermal contractible plastic pipe is packaged.
Preferably, the size of this LYSO scintillation crystal is 3mm × 3mm × 11mm；This silicon photoelectricity times
The size increasing die is 3mm × 3mm；This silicon photomultiplier chip silicon photomultiplier chip
The back side has multiple pin, and each pin connects wire.
Preferably, Tai Weike (tyvek) paper or enhanced specular reflectivity film (Enhanced are used
Specular Reflector, ESR) replace described encapsulation LYSO scintillation crystal in addition to rear end face
The aluminium foil that other surfaces are used.
For reaching above-mentioned purpose, present invention also offers the method for packing of a kind of X-ray detector, should
Method includes:
Step 1: the surface of the rear end face of LYSO scintillation crystal with silicon photomultiplier chip is close to；
Step 2: all use aluminium foil to carry out on other surfaces in addition to rear end face of LYSO scintillation crystal
Encapsulation, prevents passage of scintillation light from spilling；
Step 3: each pin of silicon photomultiplier chip back is drawn by wire；
Step 4: by LYSO scintillation crystal and silicon photomultiplier chip two part overall employing heat
Contracting plastic tube is packaged.
Preferably, this LYSO scintillation crystal is that front/rear end is foursquare cuboid, its size
For 3mm × 3mm × 11mm.
Preferably, this silicon photomultiplier chip is square, a size of 3mm × 3mm；This silicon light
The back side of electricity multiplier tube chip has multiple pin, and each pin connects wire.
Preferably, Tai Weike (tyvek) paper or enhanced specular reflectivity film (Enhanced are used
Specular Reflector, ESR) to encapsulate described in replacement step 2 LYSO scintillation crystal except rear end
The aluminium foil that other surfaces beyond face are used.
(3) beneficial effect
From technique scheme it can be seen that the method have the advantages that
1, the present invention provide this X-ray detector and method for packing, it is achieved that LYSO dodge
Bright crystal counter encapsulates with the optical coupling of silicon photomultiplier, and then the machinery both having achieved both is solid
Fixed and photon couples, and has again the beneficial effect of the isolation of inside and outside photon, to external world light shield simultaneously.
2, the present invention provide this integral compact X-ray detector, have compact conformation,
Small volume is skilful, can realize light shield, light isolation performance is strong, have certain cohesion tension force increases sudden strain of a muscle
Bright body and the adhesion of silicon photomultiplier, beneficially photon coupling.
3, this integral compact X-ray detector that the present invention provides, overall size after encapsulation
Less than 5mm × 5mm × 25mm (being not added with lead-in wire), both can be independently operated, also with single detector
Be conducive to multiple detectors composition array detection system.
Accompanying drawing explanation
Fig. 1 is the structural representation of the X-ray detector according to the embodiment of the present invention；
Fig. 2 is LYSO scintillation crystal and silicon photomultiplier chip in X-ray detector shown in Fig. 1
Structural representation；
Fig. 3 is the internal structure schematic diagram of X-ray detector shown in Fig. 1；
Fig. 4 is the side being packaged the X-ray detector shown in Fig. 1 according to the embodiment of the present invention
Method flow chart；
Fig. 5 is that the X-ray detector measurement using the method for packing shown in Fig. 4 to obtain obtains
Csl37 gamma radiation source power spectrum；
Fig. 6 is that the X-ray detector measurement using the method for packing shown in Fig. 4 to obtain obtains low pass
The lower X-ray signal of amount；
Fig. 7 is that the X-ray detector measurement using the method for packing shown in Fig. 4 to obtain obtains high pass
The lower X-ray signal of amount.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with concrete real
Execute example, and referring to the drawings, the present invention is described in more detail.
As it is shown in figure 1, Fig. 1 is the structural representation of the X-ray detector according to the embodiment of the present invention,
This X-ray detector mainly includes LYSO scintillation crystal 1 and 5 two portions of silicon photomultiplier chip
Point, after wherein the photon of silicon photomultiplier chip 5 couples sensitive face 4 and LYSO scintillation crystal 1
End face size is agreed with mutually, and photon just can be amplified after entering this photon coupling sensitive face 4, forms electricity
Signal, thus be detected.Pad 6 flashes with LYSO in order to weld silicon photomultiplier chip 5
Crystal 1, reference 7 is signal and the current supply line of silicon photomultiplier.LYSO scintillation crystal 1
With silicon photomultiplier chip 5 as in figure 2 it is shown, LYSO scintillation crystal 1 is front/rear end is just
Square cuboid, the end face of silicon photomultiplier chip 5 is square, LYSO scintillation crystal 1
Rear end face couples sensitive face 4 with the photon of silicon photomultiplier chip 5 and is close to, silicon photomultiplier core
Multiple pins at sheet 5 back side are drawn by wire 7；LYSO scintillation crystal 1 is in addition to rear end face
Other surfaces all use aluminium foil 2 to be packaged；LYSO scintillation crystal 1 and silicon photomultiplier chip
5 two part overall employing thermal contractible plastic pipes 3 are packaged.
Further, in order to more clearly show that the structure of the X-ray detector of the embodiment of the present invention,
Fig. 3 shows the internal structure schematic diagram of X-ray detector shown in Fig. 1.In Fig. 3, X-ray 8
After being irradiated to the X-ray detector 9 that the present invention provides, LYSO scintillation crystal 1 is excited to send photon,
Can be amplified after the photon coupling sensitive face 4 of photon entrance silicon photomultiplier chip 5, form electricity
Signal, thus be detected.
In the present embodiment, the size of this LYSO scintillation crystal is 3mm × 3mm × 11mm；This silicon
The size of photomultiplier transit die is 3mm × 3mm；This silicon photomultiplier chip silicon photomultiplier
The back side of chip has multiple pin, and each pin connects wire.
In actual applications, the size of the size of LYSO scintillation crystal and silicon photomultiplier chip is also
Can use other arbitrary dimensions, the two is sized to be mutually adapted.The silicon light of general manufacturer
Electricity multiplier tube size has 1mm × 1mm, 2mm × 2mm, 3mm × 3mm and 6mm × 6mm,
LYSO scintillation crystal rear end face to be ensured also is correspondingly sized, in order to silicon photomultiplier is joined closely
Close.
Based on the X-ray detector shown in Fig. 1 to Fig. 3, Fig. 4 is right according to the embodiment of the present invention
The method flow diagram that X-ray detector shown in Fig. 1 is packaged, the method includes:
Step 1: the surface of the rear end face of LYSO scintillation crystal with silicon photomultiplier chip is close to；
Wherein, this LYSO scintillation crystal is that front/rear end is foursquare cuboid, and it is preferably dimensioned to
For 3mm × 3mm × 11mm；This silicon photomultiplier chip is square, its be preferably dimensioned to into
3mm×3mm。
Step 2: all use aluminium foil to carry out on other surfaces in addition to rear end face of LYSO scintillation crystal
Encapsulation, prevents passage of scintillation light from spilling；In this step, in addition to using aluminium foil, it is also possible to use Thailand's dimension
Gram (tyvek) paper or enhanced specular reflectivity film (Enhanced Specular Reflector, ESR)
It is packaged, equally prevents passage of scintillation light from spilling；
Step 3: each pin of silicon photomultiplier chip back is drawn by wire；Wherein, should
The back side of silicon photomultiplier chip has multiple pin, and each pin connects wire；
Step 4: by LYSO scintillation crystal and silicon photomultiplier chip two part overall employing heat
Contracting plastic tube is packaged.
Utilize this X-ray detector and method for packing thereof that the present invention provides, it is achieved that LYSO dodges
Bright crystal counter encapsulates with the optical coupling of silicon photomultiplier, and then the machinery both having achieved both is solid
Fixed and photon couples, and has again the beneficial effect of the isolation of inside and outside photon, to external world light shield simultaneously.With
The power spectrum of Csl37 radioactive source is measured by this X-ray detector that the lower employing present invention provides,
And carry out X-ray detection, adopt, to be verified, the X-ray detection utensil encapsulated in this way
Some advantages.
Experiment one, the spectral measurement of Csl37 radioactive source
This X-ray detector that the present invention provides is applied to the measurement of Csl37 radioactive source, it is thus achieved that
Good this radioactive source gamma ray spectroscopy, as it is shown in figure 5, this power spectrum is consistent with theoretical spectrum,
Demonstrate feasibility and the successful Application of this detector method for packing.
Experiment two, X-ray detection
This X-ray detector that the present invention provides is applied to the measurement of X-ray, it is thus achieved that each
Planting the X-ray signal under flux, Fig. 6 is X-ray signal pulse signal under small throughput, and Fig. 7 is
The signal that under high flux, signal pulse height is piled up.
Particular embodiments described above, is carried out the purpose of the present invention, technical scheme and beneficial effect
Further describe, be it should be understood that the foregoing is only the present invention specific embodiment and
, be not limited to the present invention, all within the spirit and principles in the present invention, that is done any repaiies
Change, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (10)
1. an X-ray detector, it is characterised in that this X-ray detector includes yttrium luetcium silicate
LYSO scintillation crystal and two parts of silicon photomultiplier chip, before wherein LYSO scintillation crystal is
Rear end face is foursquare cuboid, and silicon photomultiplier chip is square, and LYSO flashes crystalline substance
The surface of body rear end face and silicon photomultiplier chip is close to, silicon photomultiplier chip back multiple
Pin is drawn by wire；LYSO scintillation crystal other surfaces in addition to rear end face all use aluminium foil
It is packaged；LYSO scintillation crystal and silicon photomultiplier chip two part overall employing thermal contraction plastic
Material pipe is packaged.
X-ray detector the most according to claim 1, it is characterised in that this LYSO dodges
The size of bright crystal is 3mm × 3mm × 11mm.
X-ray detector the most according to claim 1, it is characterised in that this silicon photoelectricity times
The size increasing die is 3mm × 3mm.
X-ray detector the most according to claim 1, it is characterised in that this silicon photoelectricity times
The back side increasing die silicon photomultiplier chip has multiple pin, and each pin connects wire.
X-ray detector the most according to claim 1, it is characterised in that use Tai Weike
(tyvek) paper or enhanced specular reflectivity film (Enhanced Specular Reflector, ESR) replace
Change the aluminium foil that described encapsulation LYSO scintillation crystal other surfaces in addition to rear end face are used.
6. a method for packing for the X-ray detector according to any one of claim 1 to 5,
It is characterized in that, the method includes:
Step 1: the surface of the rear end face of LYSO scintillation crystal with silicon photomultiplier chip is close to；
Step 2: all use aluminium foil to carry out on other surfaces in addition to rear end face of LYSO scintillation crystal
Encapsulation, prevents passage of scintillation light from spilling；
Step 3: each pin of silicon photomultiplier chip back is drawn by wire；
Step 4: by LYSO scintillation crystal and silicon photomultiplier chip two part overall employing heat
Contracting plastic tube is packaged.
The method for packing of X-ray detector the most according to claim 6, it is characterised in that
This LYSO scintillation crystal is that front/rear end is foursquare cuboid, and it is a size of
3mm×3mm×11mm。
The method for packing of X-ray detector the most according to claim 6, it is characterised in that
This silicon photomultiplier chip is square, a size of 3mm × 3mm.
The method for packing of X-ray detector the most according to claim 6, it is characterised in that
The back side of this silicon photomultiplier chip has multiple pin, and each pin connects wire.
The method for packing of X-ray detector the most according to claim 6, it is characterised in that
Use Tai Weike (tyvek) paper or enhanced specular reflectivity film (Enhanced Specular Reflector,
ESR) come to encapsulate described in replacement step 2 LYSO scintillation crystal other surface institutes in addition to rear end face
The aluminium foil used.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410490998 | 2014-09-23 | ||
| CN2014104909988 | 2014-09-23 |
Publications (1)
| Publication Number | Publication Date |
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| CN105988132A true CN105988132A (en) | 2016-10-05 |
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| CN201510082280.XA Pending CN105988132A (en) | 2014-09-23 | 2015-02-15 | X-ray detector and packaging method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110231645A (en) * | 2018-03-05 | 2019-09-13 | 无锡通透光电科技有限公司 | A kind of diamagnetic flash detector probe |
| CN110231647A (en) * | 2018-03-05 | 2019-09-13 | 无锡通透光电科技有限公司 | A kind of nuclear radiation and metal dual intensity survey meter |
| CN110646835A (en) * | 2019-10-31 | 2020-01-03 | 中国工程物理研究院流体物理研究所 | Experimental device and experimental method for shortening LYSO crystal scintillation decay time |
| CN112180420A (en) * | 2020-04-21 | 2021-01-05 | 宁波甬东核辐射监测有限公司 | Plastic scintillator and preparation method thereof, and beta particle detector |
| CN112987072A (en) * | 2021-02-08 | 2021-06-18 | 核芯光电科技(山东)有限公司 | CT detector module based on dark silicon detector module |
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| CN110231645A (en) * | 2018-03-05 | 2019-09-13 | 无锡通透光电科技有限公司 | A kind of diamagnetic flash detector probe |
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| CN110646835A (en) * | 2019-10-31 | 2020-01-03 | 中国工程物理研究院流体物理研究所 | Experimental device and experimental method for shortening LYSO crystal scintillation decay time |
| CN112180420A (en) * | 2020-04-21 | 2021-01-05 | 宁波甬东核辐射监测有限公司 | Plastic scintillator and preparation method thereof, and beta particle detector |
| CN112987072A (en) * | 2021-02-08 | 2021-06-18 | 核芯光电科技(山东)有限公司 | CT detector module based on dark silicon detector module |
| CN112987072B (en) * | 2021-02-08 | 2022-08-30 | 核芯光电科技(山东)有限公司 | CT detector module based on dark silicon detector module |
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