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    • 3. 发明授权
    • Electrochemical method to improve MR reader edge definition and device reliability
    • 电化学方法提高MR读取器边缘定义和器件可靠性
    • US06287476B1
    • 2001-09-11
    • US09332429
    • 1999-06-14
    • Kochan JuShou-Chen KaoCherng-Chyi HanJei-Wei ChangMao-Min Chen
    • Kochan JuShou-Chen KaoCherng-Chyi HanJei-Wei ChangMao-Min Chen
    • G11B5127
    • B82Y25/00B82Y10/00G01R33/09G11B5/3106G11B5/3133G11B5/3903G11B5/40G11B2005/3996
    • A method to form a passivation layer using an electrochemical process over a MR Sensor so that the passivation layer defines the MR track width. The passivation layer is formed by anodizing the MR sensor. The passivation layer is an electrical insulator (preventing Sensor current (I) from shunting through the overspray) and a heat conductor to allow MR heat to dissipate away from the MR sensor through the overspray. The method comprises: forming a passivation layer on the MR sensor; the passivation layer formed using an electrochemical process. Then we spinning-on and printing a lift-off photoresist structure over the passivation layer. The passivation layer is etched to remove the passivation layer not covered by the lift-off structure thereby defining a track width of the MR sensor. Then we deposit a lead layer over the passivation layer and MR sensor. The lift-off structure is removed where by the passivation layer defines a track width. The passivation layer is an electrical insulator that prevents sensor current (I) form shunting through overspray layers while allowing heat to dissipate through to the lead layer.
    • 使用MR传感器上的电化学过程形成钝化层的方法,使得钝化层限定MR磁道宽度。 通过阳极氧化MR传感器形成钝化层。 钝化层是电绝缘体(防止传感器电流(I)通过过喷)分流)和热导体,以允许MR热量通过过喷器散射离开MR传感器。 该方法包括:在MR传感器上形成钝化层; 使用电化学工艺形成钝化层。 然后我们旋转并在钝化层上印刷剥离光致抗蚀剂结构。 蚀刻钝化层以除去未被剥离结构覆盖的钝化层,从而限定MR传感器的轨道宽度。 然后我们在钝化层和MR传感器上沉积铅层。 去除剥离结构,其中钝化层限定轨道宽度。 钝化层是电绝缘体,其防止传感器电流(I)通过过喷层形成分流,同时允许热量散发到引线层。
    • 6. 发明授权
    • Chemical approach to develop lift-off photoresist structure and passivate MR sensor
    • 化学方法开发剥离光致抗蚀剂结构和钝化MR传感器
    • US06274025B1
    • 2001-08-14
    • US09332433
    • 1999-06-14
    • Jei-Wei ChangShou-Chen KaoCherng-Chyi HanKochan JuMao-Min Chen
    • Jei-Wei ChangShou-Chen KaoCherng-Chyi HanKochan JuMao-Min Chen
    • C25D502
    • B82Y25/00B82Y10/00G11B5/3106G11B5/3163G11B5/3903G11B2005/3996
    • A method to form a passivation layer over a MR Sensor so that the passivation layer defines the track width. The passivation layer is formed simultaneously with the development of the lift off structure in a novel developing/oxidizing solution that oxidizes the MR sensor and develops the photoresist. The passivation layer is an electrical insulator that prevents sensor current from shunting through the overspray of the leads and a heat conductor to allow MR heat to dissipate through the overspray. The method comprises: spinning-on and printing a lift-off photoresist structure over the MR sensor. Next, the lift-off photoresist structure is developed. The MR sensor is anodized in a developing/oxidizing solution to: (1) remove portions of the lower photoresist and (2) to form a (e.g., thin NiFeO) passivation layer on the MR layer at least partially under the upper photoresist layer. The passivation layer is etched to remove the passivation layer not covered by the lift-off structure. Then, a lead layer is deposited over the passivation layer and MR sensor. The lift-off structure is removed.
    • 在MR传感器上形成钝化层的方法,使得钝化层限定轨道宽度。 钝化层与氧化MR传感器并显影光致抗蚀剂的新型显影/氧化溶液中的剥离结构的发展同时形成。 钝化层是电绝缘体,其防止传感器电流通过引线的过度喷射和热导体分流,以允许MR热量通过过喷器消散。 该方法包括:在MR传感器上旋转并打印剥离光致抗蚀剂结构。 接下来,开发剥离光致抗蚀剂结构。 将MR传感器在显影/氧化溶液中进行阳极氧化,以:(1)去除下部光致抗蚀剂的部分,和(2)在MR层上至少部分地在上部光致抗蚀剂层下形成(例如,薄的NiFeO)钝化层。 钝化层被蚀刻以除去未被剥离结构覆盖的钝化层。 然后,在钝化层和MR传感器上沉积引线层。 剥离结构被去除。