JP7498385B2 - 磁気ストライプを読み取る磁気読み取りセンサ装置及び磁気読み取りセンサを製造する方法 - Google Patents
磁気ストライプを読み取る磁気読み取りセンサ装置及び磁気読み取りセンサを製造する方法 Download PDFInfo
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- G01R33/098—Magnetoresistive devices comprising tunnel junctions, e.g. tunnel magnetoresistance sensors
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Description
ウエハを用意することと、
ウエハ上に基板を形成することと、
基板上に少なくとも1つの配線工程(BEOL)相互接続層を形成することと、
少なくとも1つのBEOL相互接続層内に埋め込まれた複数の磁気抵抗センサ素子を備える少なくとも1つのMRセンサ回路を形成することである。
ウエハ200を用意することと、
ウエハ200上に基板10を形成することと、
基板10上に少なくとも1つの配線工程(BEOL)相互接続層20を形成することと、
少なくとも1つのBEOL相互接続層20内に埋め込まれた複数の磁気抵抗センサ素子25を備える少なくとも1つのMRセンサ回路を形成することである。
10 基板
100 磁気ストライプ
101 磁場
102 磁性要素
11 スルーホールコンタクト
12 はんだボール
20 BEOL相互接続層
21 接着パッド
22 ウエハの天頂面
23 接着ワイヤ
24 ウエハの下面
25 磁気抵抗センサ要素
26 磁気抵抗要素
30 保護層
40 パッケージ基板
41 面取りした形状
42 パッケージの天頂面
43 面取りした外形
44 磁束集中器
45 平坦な部
46 底部パッド
300 パッケージしたMRセンサ装置
200 ウエハ
Claims (11)
- 磁気ストライプを読み取る磁気読み取り(MR)センサ装置を備える、パッケージ化されたMRセンサ装置であって、
前記MRセンサ装置が、ウエハ上に設けられた基板と、配線工程(BEOL)相互接続層と、前記BEOL相互接続層内に埋め込まれた複数の磁気抵抗センサ素子とを備え、
前記MRセンサ装置が、少なくとも3GPaのビッカース硬さを有する保護層を備え、前記保護層が前記BEOL相互接続層に直接載っていて、
前記パッケージ化されたMRセンサ装置が、パッケージ基板にさらに相互接続されていて、前記パッケージ化されたMRセンサ装置が、前記パッケージ基板の天頂面上に、面取りされた外形を備え、前記面取りされた外形が、前記MRセンサ装置の幅と同一の幅を持つ平坦部分を備える、パッケージ化されたMRセンサ装置。 - 前記保護層は、1より小さな摩擦係数μ、又は0.5より小さな摩擦係数μを持つ、請求項1に記載のパッケージ化されたMRセンサ装置。
- 前記保護層の摩耗率は、10-7mm3N-1m-1未満である、請求項1に記載のパッケージ化されたMRセンサ装置。
- 前記保護層は、DLC層を備える、請求項1に記載のパッケージ化されたMRセンサ装置。
- 前記MRセンサ装置と前記パッケージ基板との間の相互接続を提供するはんだボールを備える、請求項1に記載のパッケージ化されたMRセンサ装置。
- 前記BEOL相互接続層は、前記基板と前記保護層との間にあり、
前記MRセンサ装置は、ビアと前記はんだボールとが、MRセンサダイと前記パッケージ基板との間の相互接続を提供するように基板を貫通する前記ビアを備える、請求項5に記載のパッケージ化されたMRセンサ装置。 - 磁束集中器をさらに備える、請求項1に記載のパッケージ化されたMRセンサ装置。
- パッケージ化されたMRセンサ装置を製造する方法であって、前記パッケージ化されたMRセンサ装置が、
ウエハ上に設けられた基板と、配線工程(BEOL)相互接続層と、前記BEOL相互接続層内に埋め込まれた複数の磁気抵抗センサ素子とを備えるMRセンサ装置を備え、
前記MRセンサ装置が、少なくとも3GPaのビッカース硬さを有する保護層を備え、前記保護層が前記BEOL相互接続層に直接載っていて、
前記パッケージ化されたMRセンサ装置が、パッケージ基板にさらに相互接続されていて、
前記パッケージ化されたMRセンサ装置が、前記パッケージ基板の天頂面上に、面取りされた外形を備え、前記面取りされた外形が、前記MRセンサ装置の幅と同一の幅を持つ平坦部分を備える、前記パッケージ化されたMRセンサ装置を製造する方法が、
ウエハを用意することと、
前記ウエハ上に基板を形成することと、
前記基板上に少なくとも1つの配線工程(BEOL)相互接続層を形成することと、
少なくとも1つの前記BEOL相互接続層内に埋め込まれた複数の磁気抵抗センサ素子を備える少なくとも1つのMRセンサ回路を形成することと、
少なくとも3GPaのビッカース硬さを持つ保護塗布層を形成することと
を備える方法。 - 前記保護層の厚みは、1nmと1μmとの間にある、請求項8に記載の方法。
- 個々のダイスを得るべく前記ウエハをダイシングすることをさらに備え、前記MRセンサ装置の各ダイは前記MRセンサ回路を備え、
少なくとも1つのダイスをパッケージ基板に配置することと、
1つの前記ダイスのBEOL相互接続層と前記パッケージ基板との間に相互接続を提供することと
を備える、請求項8に記載の方法。 - 少なくとも1つの前記BEOL相互接続層を前記基板上に形成し、前記保護塗布層は、少なくとも1つの前記BEOL相互接続層上に形成し、
前記相互接続を提供することは、はんだボールをMRセンサ装置に形成することを備え、 前記相互接続を提供することは、貫通シリコンビアと前記はんだボールとが、前記MRセンサ装置のダイと前記パッケージ基板との間の相互接続を提供するように、前記貫通シリコンビアを前記基板に提供することをさらに備える、請求項10に記載の方法。
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JP2013197524A (ja) | 2012-03-22 | 2013-09-30 | Toshiba Corp | 磁気抵抗効果素子の製造方法 |
JP2017173123A (ja) | 2016-03-23 | 2017-09-28 | アルプス電気株式会社 | 磁気センサおよびその製造方法 |
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