JPWO2019009124A1 - 導電性樹脂組成物及びそれを用いたシールドパッケージの製造方法 - Google Patents
導電性樹脂組成物及びそれを用いたシールドパッケージの製造方法 Download PDFInfo
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- JPWO2019009124A1 JPWO2019009124A1 JP2019527640A JP2019527640A JPWO2019009124A1 JP WO2019009124 A1 JPWO2019009124 A1 JP WO2019009124A1 JP 2019527640 A JP2019527640 A JP 2019527640A JP 2019527640 A JP2019527640 A JP 2019527640A JP WO2019009124 A1 JPWO2019009124 A1 JP WO2019009124A1
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
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Abstract
Description
B……個片化されたシールドパッケージ、
B1,B2,B9……個片化される前のシールドパッケージ、
1……基板、2……電子部品、3……グランド回路パターン(銅箔)、4……封止材、
5……シールド層(導電性塗膜)、11〜19……溝、
20……基板、21……電極パッド、22……導電性樹脂組成物の硬化物
次に示す(メタ)アクリル系樹脂(a1〜a3)と、モノマー(b1〜b3)との合計量100質量部に対して、導電性フィラー(c)、導電性フィラー(d)、導電性フィラー(α)、導電性フィラー(β)、ラジカル重合開始剤及び溶剤を表1に記載された割合で配合して混合し、導電性樹脂組成物を得た。使用した各成分の詳細は以下の通りである。
(メタ)アクリル系樹脂(a1):分子量=17000
(メタ)アクリル系樹脂(a2):分子量=100000、共栄社化学(株)製「KC−1700P」
(メタ)アクリル系樹脂(a3):分子量=130000、共栄社化学(株)製「KC−1100」
モノマー(b1):4−ヒドロキシブチルアクリレートグリシジルエーテル
モノマー(b2):共栄社化学(株)製「ライトアクリレート P−1A(N)」
モノマー(b3):株式会社ADEKA製「ED503」
導電性フィラー(c):銀粒子(平均粒子径=150nm、球状)
導電性フィラー(d):銀被覆銅合金粉(平均粒子径=5μm、フレーク状、アスペクト比=2〜10、タップ密度=5.8g/cm3)
導電性フィラー(α):銀粒子(平均粒子径=8nm、球状、界面活性剤により銀粒子が分散した水溶液として配合)
導電性フィラー(β):銀粒子(平均粒子径=800nm、球状)
ラジカル重合開始剤(e):2,2’−アゾビス(イソ酪酸)ジメチル
溶剤:メチルエチルケトン(MEK)
実施例1の導電性樹脂組成物から得られた導電性塗膜の導電性を、比抵抗で評価した。
シールド層とパッケージ表面又はグランド回路との密着性を、JIS K 5600−5−6:1999(クロスカット法)に基づき評価した。
0:カットの縁が完全に滑らかで、どの格子の目にもはがれがない。
1:カットの交差点において塗膜の小さなはがれが生じている。クロスカット部分で影響を受けるのは明確に5%を上回ることはない。
2:塗膜がカットの縁に沿って、及び/又は交差点においてはがれている。クロスカット部分で影響を受けるのは明確に5%を越えるが15%を上回ることはない。
3:塗膜がカットの縁に沿って、部分的又は全面的に大はがれを生じており、及び/又は目のいろいろな部分が、部分的又は全面的にはがれている。クロスカット部分で影響を受けるのは、明確に15%を越えるが35%を上回ることはない。
4:塗膜がカットの縁に沿って、部分的又は全面的に大はがれを生じており、及び/又は数カ所の目が部分的又全面的にはがれている。クロスカット部分で影響を受けるのは、明確に35%を上回ることはない。
5:分類4でも分類できないはがれ程度のいずれか。
Claims (5)
- (A)重量平均分子量が1000以上40万以下である(メタ)アクリル系樹脂と、
(B)分子内にグリシジル基、及び/又は(メタ)アクリロイル基を有するモノマーと、
(C)平均粒子径が10〜500nmである導電性フィラーと、
(D)平均粒子径が1〜50μmである導電性フィラーと、
(E)ラジカル重合開始剤と
を少なくとも含有し、
導電性フィラー(C)と導電性フィラー(D)との合計の含有量が、(メタ)アクリル系樹脂(A)とモノマー(B)との合計量100質量部に対して、2000〜80000質量部であり、
導電性フィラー(C)と導電性フィラー(D)との含有割合(導電性フィラー(C):導電性フィラー(D))が、質量比で5:1〜1:10であることを特徴とする、
導電性樹脂組成物。 - 前記モノマー(B)が、分子内にグリシジル基及び(メタ)アクリロイル基を有するものであることを特徴とする、請求項1に記載の導電性樹脂組成物。
- 前記導電性フィラー(D)が、銅粉、銀被覆銅粉、及び銀被覆銅合金粉からなる群より選択される少なくとも1種である、請求項1又は2に記載の導電性樹脂組成物。
- 電子部品のパッケージのシールド用である、請求項1〜3のいずれか1項に記載の導電性樹脂組成物。
- 基板上に電子部品が搭載され、この電子部品が封止材によって封止されたパッケージがシールド層によって被覆されたシールドパッケージの製造方法であって、
基板上に複数の電子部品を搭載し、この基板上に封止材を充填して硬化させることにより前記電子部品を封止する工程と、
前記複数の電子部品間で封止材を切削して溝部を形成し、これらの溝部によって基板上の各電子部品のパッケージを個別化させる工程と、
前記個別化したパッケージの表面に、請求項1〜4のいずれか1項に記載の導電性樹脂組成物を噴霧により塗布する工程と、
前記パッケージの表面に導電性樹脂組成物が塗布された基板を加熱して、前記導電性樹脂組成物を硬化させることによりシールド層を形成する工程と、
前記基板を前記溝部に沿って切断することにより個片化したシールドパッケージを得る工程と
を少なくとも有する、シールドパッケージの製造方法。
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JP7164181B2 (ja) * | 2019-02-27 | 2022-11-01 | ナミックス株式会社 | 電磁波シールド用スプレー塗布剤 |
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TW201909724A (zh) | 2019-03-01 |
WO2019009124A1 (ja) | 2019-01-10 |
JP7354510B2 (ja) | 2023-10-03 |
KR20200026956A (ko) | 2020-03-11 |
CN110651004A (zh) | 2020-01-03 |
EP3650499A4 (en) | 2021-04-21 |
KR102517052B1 (ko) | 2023-03-31 |
CN110651004B (zh) | 2022-03-25 |
EP3650499B1 (en) | 2023-11-08 |
TWI771444B (zh) | 2022-07-21 |
EP3650499A1 (en) | 2020-05-13 |
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