JP5507088B2 - チップ用保護膜形成用シートおよび保護膜付半導体チップ - Google Patents
チップ用保護膜形成用シートおよび保護膜付半導体チップ Download PDFInfo
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- JP5507088B2 JP5507088B2 JP2009016486A JP2009016486A JP5507088B2 JP 5507088 B2 JP5507088 B2 JP 5507088B2 JP 2009016486 A JP2009016486 A JP 2009016486A JP 2009016486 A JP2009016486 A JP 2009016486A JP 5507088 B2 JP5507088 B2 JP 5507088B2
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- protective film
- chip
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- sheet
- forming layer
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Images
Landscapes
- Adhesive Tapes (AREA)
Description
(1)保護膜形成層と剥離シートとを剥離する工程
(2)保護膜形成層を硬化させる工程
(3)半導体ウエハおよび保護膜形成層をダイシングする工程
[チップ用保護膜形成用シート]
図1は、本発明の一実施形態に係るチップ用保護膜形成用シートの断面図である。また、図2は、本発明の一実施形態に係るチップ用保護膜形成用シートの平面図である。
熱硬化性樹脂(A)としては、例えば、エポキシ樹脂、フェノール樹脂、メラミン樹脂、尿素樹脂、ポリエステル樹脂、ウレタン樹脂、アクリル樹脂、ポリイミド樹脂、ベンゾオキサジン樹脂等が挙げられ、それらの1種を単独で、または2種以上を組み合わせて用いることができる。特に本実施形態では、エポキシ樹脂、フェノール樹脂またはそれらの混合物が好ましく用いられる。
上記チップ用保護膜形成用シート4は、常法によって製造することができる。例えば、保護膜形成層3を構成する材料(樹脂組成物)と、所望によりさらに溶媒とを含有する塗布剤を調製し、剥離シート1の剥離面上に、複数の塗布ヘッドの付いたダイコーター、マイクロダイコーター、カーテンコーター、スプレーコーター、スリットコーター、ナイフコーター等によりパターンコートすることにより、またはスクリーン印刷、グラビア印刷、オフセット印刷、インクジェット印刷等のパターン印刷により塗布して乾燥させ、平面方向に2色以上の色を有する保護膜形成層3を形成する。
図3は、本発明の一実施形態に係る保護膜付半導体チップの平面図である。また、図4は、本発明の一実施形態に係る保護膜付半導体チップの側面図である。
(1)保護膜形成層と剥離シートとを剥離する工程
(2)保護膜形成層を硬化させる工程
(3)半導体ウエハおよび保護膜形成層をダイシングする工程
液状ビスフェノールA型エポキシ樹脂(エポキシ当量:180〜200g/eq)30質量部と、固形ビスフェノールA型エポキシ樹脂(エポキシ当量:800〜900g/eq)40質量部と、o−クレゾールノボラック型エポキシ樹脂(エポキシ当量:210〜230g/eq)10質量部とを混合し、これを熱硬化性樹脂(A)とした。
着色剤(B)として、黄色顔料(カドミウムイエロー)1.5質量部を使用した以外は、調製例1における保護膜形成層用の塗布液1と同様にして、保護膜形成層用の塗布液2を調製した。
アクリル酸ブチル65質量部と、メタクリル酸メチル10質量部と、アクリル酸メチル10質量部と、アクリル酸2−ヒドロキシエチル15質量部とを共重合して、重量平均分子量80万のアクリル系共重合体を得た。このアクリル系共重合体を、バインダーポリマーとした。
着色剤(B)として、緑色顔料(クロムグリーン)1.8質量部を使用した以外は、調製例3における保護膜形成層用の塗布液3と同様にして、保護膜形成層用の塗布液4を調製した。
剥離シートとしての片面を剥離処理したポリエチレンテレフタレートフィルム(厚さ:38μm,表面張力:30mN/m)の剥離処理面(剥離面)に、保護膜形成層用の塗布液1および保護膜形成層用の塗布液2を、それぞれ乾燥後の厚さが30μmとなり、そして平面視4mm×4mmの市松模様になるように、スクリーン印刷機を用いて塗布した後、乾燥させて、保護膜形成層を形成し、チップ用保護膜形成用シートを得た。
剥離シートとしての片面を剥離処理したポリエチレンテレフタレートフィルム(厚さ:38μm,表面張力:30mN/m)の剥離処理面(剥離面)に、保護膜形成層用の塗布液3および保護膜形成層用の塗布液4を、それぞれ乾燥後の厚さが30μmとなり、そして平面視幅4mm/4mmのストライプ模様になるように、マイクロダイコーターを用いて塗布した後、乾燥させて、保護膜形成層を形成し、チップ用保護膜形成用シートを得た。
実施例1,2で得られた保護膜付半導体チップを、それぞれフェースダウン方式で基板上に実装した。各保護膜付半導体チップは、レーザーによるマーキングがなく、同形であるにもかかわらず、それらの模様の違いによって、容易に識別することができ、また、基板上の適切な位置に適切な半導体チップが実装されていることが容易に確認できた。
3…保護膜形成層
3’…保護膜
4…チップ用保護膜形成用シート
5…保護膜付半導体チップ
6…半導体チップ
Claims (10)
- チップに積層され、当該チップの保護膜を形成するためのチップ用保護膜形成用シートであって、
剥離シートと、
前記剥離シートの剥離面上に形成された硬化性の保護膜形成層とを有し、
前記保護膜形成層は、前記チップ用保護膜形成用シートがウエハに貼付されたときに、当該ウエハから得られる各チップにつき平面方向に2色以上の色にて市松模様が付与されるように着色されている
ことを特徴とするチップ用保護膜形成用シート。 - 前記保護膜形成層は、前記チップの種類に応じて異なるように着色されていることを特徴とする請求項1に記載のチップ用保護膜形成用シート。
- チップに積層され、当該チップの保護膜を形成するためのチップ用保護膜形成用シートであって、
剥離シートと、
前記剥離シートの剥離面上に形成された硬化性の保護膜形成層とを有し、
前記保護膜形成層は、前記チップ用保護膜形成用シートがウエハに貼付されたときに、当該ウエハから得られる各チップにつき平面方向に2色以上の色にてランダムな模様が付与されるように着色されている
ことを特徴とするチップ用保護膜形成用シート。 - 前記保護膜形成層は、熱硬化性樹脂(A)および着色剤(B)を含有する樹脂組成物からなることを特徴とする請求項1〜3のいずれかに記載のチップ用保護膜形成用シート。
- 前記保護膜形成層は、エネルギー線硬化性樹脂(C)および着色剤(B)を含有する樹脂組成物からなることを特徴とする請求項1〜3のいずれかに記載のチップ用保護膜形成用シート。
- 前記保護膜形成層は、熱硬化性樹脂(A)、着色剤(B)およびエネルギー線硬化性樹脂(C)を含有する樹脂組成物からなることを特徴とする請求項1〜3のいずれかに記載のチップ用保護膜形成用シート。
- 前記保護膜形成層における前記剥離シートと接する面の反対側の面上に、第2の剥離シートを有することを特徴とする請求項1〜6のいずれかに記載のチップ用保護膜形成用シート。
- 表面に回路が形成された半導体ウエハの裏面に、請求項1〜7のいずれかに記載のチップ用保護膜形成用シートの保護膜形成層を貼付した後、以下の工程(1)〜(3)を任意の順で行って、平面方向に2色以上の色を有する保護膜を裏面に有する半導体チップを得ることを特徴とする保護膜付半導体チップの製造方法。
(1)保護膜形成層と剥離シートとを剥離する工程
(2)保護膜形成層を硬化させる工程
(3)半導体ウエハおよび保護膜形成層をダイシングする工程 - 半導体チップ裏面に保護膜が形成された保護膜付半導体チップであって、
前記保護膜は、各半導体チップにつき平面方向に2色以上の色にて市松模様を有する硬化性の保護膜形成層を硬化して得られる膜である
ことを特徴とする保護膜付半導体チップ。 - 半導体チップ裏面に保護膜が形成された保護膜付半導体チップであって、
前記保護膜は、各半導体チップにつき平面方向に2色以上の色にてランダムな模様を有する硬化性の保護膜形成層を硬化して得られる膜である
ことを特徴とする保護膜付半導体チップ。
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