JP6005092B2 - 放射線検出装置および放射線検出装置の製造方法 - Google Patents
放射線検出装置および放射線検出装置の製造方法 Download PDFInfo
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- JP6005092B2 JP6005092B2 JP2014062482A JP2014062482A JP6005092B2 JP 6005092 B2 JP6005092 B2 JP 6005092B2 JP 2014062482 A JP2014062482 A JP 2014062482A JP 2014062482 A JP2014062482 A JP 2014062482A JP 6005092 B2 JP6005092 B2 JP 6005092B2
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- thermoplastic resin
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Description
図1は、本発明の実施形態に係る放射線検出装置10の構成を示す斜視図である。放射線検出装置10は、可搬型の電子カセッテの形態を有し、放射線検出パネル30(FPD)と、制御ユニット12と、支持板16と、制御ユニット12および支持板16を収容する筐体14と、を含んで構成されている。
図11は、本発明の第2の実施形態に係る放射線検出装置10の製造方法を示す工程フロー図である。図11において、上記した第1の実施形態に係る工程(図6参照)と実質的に同じ工程については、同一の参照符号を付与し、重複する説明は省略する。
図16は、本発明の第3の実施形態に係る放射線検出装置10の製造方法を示す工程フロー図である。図16において、第1の実施形態に係る工程(図6参照)および第2の実施形態に係る工程(図11参照)と実質的に同じ工程については、同一の参照符号を付与し、重複する説明は省略する。第3の実施形態に係る製造方法は、熱可塑性樹脂層50(ホットメルト樹脂)および有機層52(PETフィルム)を積層した積層フィルムを作製し、この積層フィルムとシンチレータ32とを接着した後に、有機層52(PETフィルム)上に無機反射層54(Al箔)を接着する点が上記第1および第2の実施形態に係る製造方法と異なる。
図17は、本発明の第4の実施形態に係る放射線検出装置10の製造方法を示す工程フロー図である。図17において、第1の実施形態に係る工程(図6参照)および第2の実施形態に係る工程(図11参照)と実質的に同じ工程については、同一の参照符号を付与し、重複する説明は省略する。第4の実施形態に係る製造方法は、熱可塑性樹脂層50(ホットメルト樹脂)を、有機層52(PETフィルム)と積層した積層フィルムの形態でシンチレータ32上に供給するのではなく、熱可塑性樹脂層50をシンチレータ32上に直接コーティングする工程(工程S33)を含む点において、上記第1〜第3の実施形態に係る製造方法と異なる。
図19は、本発明の第5の実施形態に係る放射線検出パネル30の部分的な構成を示す断面図である。第5の実施形態に係る放射線検出パネル30は、無機反射層54の上に、第2の有機層58を更に含む点において、図5および図15に示す放射線検出パネル30と異なる。第2の有機層58は、無機反射層54の上面を保護するための保護層として機能する。第2の有機層58の材料としては、例えば、PET(ポリエチレンテレフタレート)、PPS(ポリフェニレンサルファイド)、OPP(2軸延伸ポリプロピレン)、PEN(ポリエチレンナフタレート)、PI(ポリイミド)、Ny(ナイロン)、PC(ポリカーボネート)、CPP(無延伸ポリプロピレン)、PE(ポリエチレン)、PVC(ポリ塩化ビニル)等が挙げられる。また、第2の有機層58は、上記の材料を含む複数の層で構成されていてもよい。このように、無機反射層54の上面を第2の有機層58で覆うことにより、無機反射層54の劣化を防止することができる。
上記した各実施形態においては、熱可塑性樹脂層50としてホットメルト樹脂を用いる場合を例示したが、ホットメルト樹脂以外の樹脂を用いることも可能である。ホットメルト樹脂以外の熱可塑性樹脂としては、例えば、PE(ポリエチレン:融点136℃、ヤング率0.2GPa)やPB(ポリブテン:融点125℃ ヤング率0.5GPa)等が挙げられる。ホットメルト樹脂のカテゴリーに属さないこれらの熱可塑性樹脂は、接着剤としての機能を有しないことから、シンチレータ32と熱可塑性樹脂層50との間および熱可塑性樹脂層50と有機層52との間に、それぞれ、接着剤を介在させる必要がある。接着剤としては、例えば、タケラックA626/タケネートA50(三井化学株式会社 「タケラック」、「タケネート」は登録商標)、アドコートTM−569/CAT−RT37−0.8K(東洋モートン株式会社 「アドコート」は登録商標)等を用いることが可能である。
30 放射線検出パネル
32 シンチレータ
34 センサ基板
36 センサ部
50 熱可塑性樹脂層
52 有機層(第1の有機層)
54 無機反射層
55A ラミネートフィルム
58 有機層(第2の有機層)
60 柱状結晶
62 突出部
Claims (17)
- 放射線を光に変換するシンチレータと、
前記シンチレータを支持し、前記シンチレータにて変換された光に基づいて電荷を生成する複数のセンサ部を有する基板と、
前記シンチレータの上に設けられた熱可塑性樹脂層と、
前記熱可塑性樹脂層の上に設けられた第1の有機層と、
前記第1の有機層の上に設けられた無機反射層と、
を備え、
前記熱可塑性樹脂層の溶融開始温度は、前記第1の有機層の溶融開始温度よりも低く、
前記シンチレータは、前記熱可塑性樹脂層が設けられている側の面内に突出部を有し、
前記突出部の先端が前記熱可塑性樹脂層を貫通して前記第1の有機層に接している
放射線検出装置。 - 前記シンチレータは、前記熱可塑性樹脂層が設けられている側の面内に複数の突出部を有し、
前記複数の突出部のうちの少なくとも一部の先端が前記熱可塑性樹脂層を貫通して前記第1の有機層に接している
請求項1に記載の放射線検出装置。 - 前記シンチレータは、前記熱可塑性樹脂層が設けられている側の面内に他の部分よりも突出した複数の突出部を有し、
前記複数の突出部のうちの少なくとも一部の突出部がつぶされた状態となっており、つぶされた状態の突出部の少なくとも一部の先端が前記熱可塑性樹脂層を貫通して前記第1の有機層に接している
請求項1に記載の放射線検出装置。 - 前記シンチレータは、複数の柱状結晶を含み、
前記突出部は、前記複数の柱状結晶の平均高さよりも高い少なくとも1つの柱状結晶の先端部を含んで構成されている
請求項1から請求項3のいずれか1項に記載の放射線検出装置。 - 前記熱可塑性樹脂層は、ホットメルト樹脂を含んで構成されている
請求項1から請求項4のいずれか1項に記載の放射線検出装置。 - 更に、前記無機反射層の上に第2の有機層が設けられている
請求項1から請求項5のいずれか1項に記載の放射線検出装置。 - 基板の上にシンチレータを形成する形成工程と、
第1の温度で溶融を開始する熱可塑性樹脂層と、前記第1の温度よりも高い第2の温度で溶融を開始する第1の有機層と、を含む複合層を準備する準備工程と、
前記シンチレータと前記熱可塑性樹脂層とが接するように前記複合層を前記シンチレータの上に配置し、前記シンチレータの突出部が前記熱可塑性樹脂層を貫通して前記第1の有機層に接するように、前記複合層を前記第1の温度よりも高く且つ前記第2の温度よりも低い温度で加熱しつつ前記シンチレータに向けて加圧する加熱加圧工程と、
前記加熱加圧工程の後に、無機反射層を前記第1の有機層の上に形成する工程と、
を含む放射線検出装置の製造方法。 - 基板の上にシンチレータを形成する形成工程と、
第1の温度で溶融を開始する熱可塑性樹脂層と、前記熱可塑性樹脂層の上に設けられて前記第1の温度よりも高い第2の温度で溶融を開始する第1の有機層と、前記第1の有機層の上に設けられた無機反射層と、を含む複合層を準備する準備工程と、
前記シンチレータと前記熱可塑性樹脂層とが接するように前記複合層を前記シンチレータの上に配置し、前記シンチレータの突出部が前記熱可塑性樹脂層を貫通して前記第1の有機層に接するように、前記複合層を前記第1の温度よりも高く且つ前記第2の温度よりも低い温度で加熱しつつ前記シンチレータに向けて加圧する加熱加圧工程と、
を含む放射線検出装置の製造方法。 - 前記準備工程において、前記無機反射層の上に設けられた第2の有機層を更に含む複合層を準備する
請求項8に記載の製造方法。 - 基板の上にシンチレータを形成する形成工程と、
前記シンチレータの表面を第1の温度で溶融を開始する熱可塑性樹脂層で被覆する被覆工程と、
前記第1の温度よりも高い第2の温度で溶融を開始する第1の有機層と前記第1の有機層の上に設けられた無機反射層とを含む層を前記熱可塑性樹脂層の上に配置し、前記シンチレータの突出部が前記熱可塑性樹脂層を貫通して前記第1の有機層に接するように、前記熱可塑性樹脂層を前記第1の温度よりも高く且つ前記第2の温度よりも低い温度で加熱しつつ前記第1の有機層を前記シンチレータに向けて加圧する加熱加圧工程と、
を含む放射線検出装置の製造方法。 - 前記加熱加圧工程において、前記無機反射層の上に設けられた第2の有機層を含む層を前記熱可塑性樹脂層の上に配置する
請求項10に記載の製造方法。 - 前記加熱加圧工程の前に前記突出部をつぶして前記突出部の高さを低減させるつぶし加工工程を更に含む請求項7から請求項11のいずれか1項に記載の製造方法。
- 前記つぶし加工工程において、前記突出部の高さが所定の閾値以下となるように前記突出部がつぶされる請求項12に記載の製造方法。
- 前記つぶし加工工程において、前記突出部の高さが前記熱可塑性樹脂層の厚さ以下となるように前記突出部がつぶされる請求項13に記載の製造方法。
- 前記加熱加圧工程の前に前記突出部の高さを測定する測定工程を更に含み、
前記測定工程において測定された前記突出部の高さが、所定の閾値よりも高い場合に前記つぶし加工工程を実施する請求項12から請求項14のいずれか1項に記載の製造方法。 - 前記加熱加圧工程の前に前記突出部の高さを測定する測定工程を更に含み、
前記つぶし加工工程は、前記突出部に押圧力を加える処理を含み、前記測定工程において測定された前記突出部の高さに基づいて前記押圧力が定められる
請求項12から請求項14のいずれか1項に記載の製造方法。 - 前記熱可塑性樹脂層は、ホットメルト樹脂を含んで構成されている請求項7から請求項16のいずれか1項に記載の製造方法。
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