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11. 发明授权

US06647613B2 Method of making a magnetic write head and in-process head structures 有权
标题翻译：制造磁头和进程中头部结构的方法
公开(公告)号：US06647613B2
公开(公告)日：2003-11-18
申请号：US09791903
申请日：2001-02-22
申请人： Patricia A. Beck , Paul W. Poorman , George M. Clifford, Jr. , Richard H. Henze
发明人： Patricia A. Beck , Paul W. Poorman , George M. Clifford, Jr. , Richard H. Henze
IPC分类号： G11B542
CPC分类号： G11B5/187 , G11B5/1871 , G11B5/4893 , G11B5/584 , G11B15/62 , Y10T29/49032 , Y10T29/49043 , Y10T29/49048 , Y10T29/49055 , Y10T29/4906 , Y10T29/49789 , Y10T29/49798
摘要： A batch fabrication technique is described that increases the manufacturing efficiency of servo write heads and also improves servo pattern definition for fine features, while reducing tape and head wear. Multiple heads are fabricated as a batch from one or more ferrite wafers. A nominally flat, large wafer surface and a contour suitable for uniform photoresist application an planar photolithography permit fine servo pattern definition with low linewidth variation. Non-magnetic material is photolithographically defined to produce gaps above a spacer. The non-magnetic material may be photoresist, semiconductor materials, glass, metal or the like. The material may even be removed later to leave air gaps. Additionally, a lower ferrite wafer may be mated to the upper ferrite wafer to complete a magnetic circuit around the gaps. A rounded leading edge on the head creates an air bearing to reduce ware of the tape and of the head. The leading edge is rounded to form an air bearing between the head surface and the tape. Rounding of the leading edge can be accomplished by a variety of methods including blending, grinding, and faceting.
摘要翻译：描述了一种批量制造技术，其提高了伺服写入头的制造效率，并且还改善了精细特征的伺服模式定义，同时减少了磁带和磁头磨损。多个头部从一个或多个铁氧体晶片制成批次。标称平坦，大晶片表面和适合于均匀光刻胶应用的轮廓，平面光刻允许具有低线宽变化的精细伺服图案定义。非磁性材料被光刻定义以在间隔物上方产生间隙。非磁性材料可以是光致抗蚀剂，半导体材料，玻璃，金属等。材料甚至可以稍后移除以留下空隙。此外，下部铁氧体晶片可以与上部铁氧体晶片配合，以在该间隙周围形成磁路。头部圆形的前缘形成一个空气轴承，以减少磁带和头部的物品。前缘是圆形的，以在头表面和带之间形成空气轴承。前缘的四舍五入可以通过各种方法实现，包括混合，研磨和刻面。

12. 发明授权

US06236537B1 Wear resistant magnetic write head 有权
公开(公告)号：US06236537B1
公开(公告)日：2001-05-22
申请号：US09313889
申请日：1999-05-18
申请人： Paul Poorman , Stephan Howe , Patricia A. Beck , George M. Clifford, Jr. , Richard H. Henze
发明人： Paul Poorman , Stephan Howe , Patricia A. Beck , George M. Clifford, Jr. , Richard H. Henze
IPC分类号： G11B5187
CPC分类号： G11B5/584 , G11B5/255 , G11B5/4893 , G11B5/581 , G11B15/62
摘要： A head design that reduces wear at the leading and trailing edges where the tape contacts the head while minimizing any adverse effects on the performance of the head. In one embodiment of the invention, a localized layer of wear resistant material is formed on the leading edge where the tape contacts the head before passing over the head recording surface. In a second embodiment, the leading edge is formed as wear resistant material embedded in the head structure adjacent to the recording surface. And, in a third embodiment, the leading edge is formed as a wear resistant material strip affixed to the side of the head structure. For each embodiment, the wear resistant material may also be applied in the manner described to the trailing edge where the tape may also contact the head after passing over the recording surface.

13. 发明授权

US06031673A Servo band verification in linear tape systems having timing-based servo formats 失效
标题翻译：具有基于时序的伺服格式的线性磁带系统中的伺服频带验证
公开(公告)号：US06031673A
公开(公告)日：2000-02-29
申请号：US34971
申请日：1998-03-04
申请人： Donald J. Fasen , George M. Clifford, Jr.
发明人： Donald J. Fasen , George M. Clifford, Jr.
IPC分类号： G11B5/588 , G11B5/48 , G11B5/55 , G11B5/584 , G11B20/18 , G11B21/10 , G11B5/09 , G11B15/12
CPC分类号： G11B5/584 , G11B20/182 , G11B20/1879 , G11B5/4893 , G11B5/5508
摘要： A device for formatting a linear data storage tape includes a servo write head configured to write a pattern of magnetic transition stripes along a servo band of the linear data storage tape. The servo write head is configured to produce stripes having lateral widths that are significantly greater than that of a servo read element of a data read/write head designed for use with the linear data storage tape. Each stripe has either a positive non-zero azimuth or a negative non-zero azimuth. The device also includes a magnetic readback element that produces a servo verify signal. The magnetic readback element extends laterally across the full widths of the magnetic transition stripes and is oriented at an azimuth between the positive and negative non-zero azimuths of the magnetic transition stripes. A pulse detector is configured to detect pulses in the servo verify signal. Defect detection logic counts the numbers of pulses in the servo verify signal and compares such numbers with expected numbers to detect defects. Defects are also detected by identifying any pulses that exceed a predefined maximum threshold.
摘要翻译：用于格式化线性数据存储带的装置包括：伺服写入头，被配置为沿着线性数据存储带的伺服带写入磁转移条带的图案。伺服写入头被配置为产生横向宽度明显大于设计用于线性数据存储带的数据读/写头的伺服读取元件的条带。每个条带具有正非零方位或负非零方位。该装置还包括产生伺服校验信号的磁回读元件。磁回读元件横跨磁性过渡条的整个宽度横向延伸，并且被定向在磁性过渡条带的正和非零方位之间的方位角处。脉冲检测器被配置为检测伺服校验信号中的脉冲。缺陷检测逻辑对伺服校验信号中的脉冲数进行计数，并将这些数字与预期的数字进行比较以检测缺陷。还可以通过识别超过预定最大阈值的任何脉冲来检测缺陷。

14. 发明授权

US5276566A Recording/reading high density data tracks with backward compatibility 失效
标题翻译：以向后兼容性记录/读取高密度数据轨道
公开(公告)号：US5276566A
公开(公告)日：1994-01-04
申请号：US795066
申请日：1991-11-20
申请人： George M. Clifford, Jr.
发明人： George M. Clifford, Jr.
IPC分类号： G11B5/53 , G11B15/12 , G11B15/467 , G11B15/14 , G11B21/02
CPC分类号： G11B15/125 , G11B15/4671
摘要： A high density helical scan recording device having write/wide-read heads and RAW/narrow-read heads of different widths to permit an increase in the density of data tracks and to allow backward compatibility for reading and recording conventional density data tracks. The write/wide-read heads are used to record data in tracks of either the conventional density or the high density. The write/wide-read heads are also selected to read conventional density data tracks. The RAW/narrow-read heads have a reduced width that permits reading of data tracks in which greater than two-thirds of each data track has been overlapped by an adjacent data track. The RAW/narrow-read heads are used in a read-after-write (RAW) capacity and are used during a read operation of the high-density data tracks.
摘要翻译：具有写/宽读头和具有不同宽度的RAW /窄读头的高密度螺旋扫描记录装置允许增加数据轨迹的密度，并允许向后兼容性读取和记录常规密度数据轨道。写/宽读头用于将数据记录在传统密度或高密度的轨道中。写/宽读头也被选择来读取传统的密度数据轨道。 RAW /窄读头具有减小的宽度，允许读取数据轨道，其中每个数据轨道的大于三分之二已经被相邻数据轨道重叠。 RAW /窄读头用于读写（RAW）容量，并在高密度数据轨道的读取操作期间使用。

15. 发明授权

US4789915A Tape cartridge brake 失效
标题翻译：磁带机制动
公开(公告)号：US4789915A
公开(公告)日：1988-12-06
申请号：US866819
申请日：1986-05-27
申请人： George M. Clifford, Jr.
发明人： George M. Clifford, Jr.
IPC分类号： G11B23/087 , G11B23/04 , G11B25/10 , G11B23/02
CPC分类号： G11B25/10 , G11B23/04 , G11B23/043
摘要： A tape cartridge containing a pair of spools between which tape is fed and containing a brake that can stop rotation of the spools when no power is being applied to feed the tape. A passive mechanical embodiment is shown in which tension in the tape is used to release the brake.
摘要翻译：一个磁带盒，其中包含一对线轴，在该磁带之间进给磁带并且包含一个制动器，当没有电力被施加以供给磁带时可以停止转轴的制动器。示出了被动机械实施例，其中使用带中的张力来释放制动器。

16. 发明授权

US07247836B2 Method and system for determining motion based on difference image correlation 有权
标题翻译：基于差分图像相关性确定运动的方法和系统
公开(公告)号：US07247836B2
公开(公告)日：2007-07-24
申请号：US11014482
申请日：2004-12-16
申请人： S. Jeffrey Rosner , Geraint Owen , George M. Clifford, Jr.
发明人： S. Jeffrey Rosner , Geraint Owen , George M. Clifford, Jr.
IPC分类号： G09G5/08
CPC分类号： G06F3/0317
摘要： An imager captures successive images of an object. One image is then subtracted from another image to generate difference images. Each difference image is then correlated with itself or with one of the images used to generate the difference image to determine the relative motion between the imager an the object.
摘要翻译：成像仪捕获对象的连续图像。然后从另一个图像中减去一个图像以生成差异图像。然后将每个差分图像与其自身或用于生成差异图像的图像之一相关联，以确定成像器与对象之间的相对运动。

17. 发明授权

US06898045B2 Media with pre-recorded alignment transitions 有权
标题翻译：媒体具有预先记录的对齐转换
公开(公告)号：US06898045B2
公开(公告)日：2005-05-24
申请号：US10723757
申请日：2003-11-26
申请人： Patricia A. Beck , George M. Clifford, Jr.
发明人： Patricia A. Beck , George M. Clifford, Jr.
IPC分类号： G11B5/58 , G11B5/008 , G11B5/29 , G11B5/48 , G11B5/56 , G11B5/584 , G11B20/20 , G11B5/00
CPC分类号： G11B5/4893 , G11B5/00826 , G11B5/56 , G11B5/584
摘要： A device for precision alignment of a write element of a tape head to a transport direction of a media that is transported across the tape head is disclosed. The tape head includes at least one alignment element that is cofabricated with the write element so that both the write element and the alignment element have a fixed orientation with respect to a magnetic axis of the tape head. The alignment element and the write element can be fabricated on the tape head using standard microelectronic photolithographic processes. Preferably, the tape head includes a plurality of alignment elements. Those alignment elements are operative to write alignment transitions onto the media. The alignment transitions can be observed to determine if they are indicative of the write element having a predetermined orientation with respect to the transport direction. A read transducer can be used to generate signals from the alignment transitions and those signals can be analyzed to determine if the predetermined orientation of the write element has been achieved. The tape head can include horizontal and/or vertical elements for a gross visual alignment of the tape head to the media. The alignment transitions can be read by a data element of a separate data head. A signal from the data element can be used to adjust the azimuth of the data head with respect to a direction of transport. In servo writer applications where servo code is prerecorded on the media, the alignment transitions can be used to align the write elements of a servo write head to the transport direction of the media so that inter band skew between adjacent servo bands is significantly reduced.
摘要翻译：公开了一种用于将带头的写入元件精确对准到跨磁带头传送的介质的输送方向的装置。带头包括与写入元件共同构成的至少一个对准元件，使得写入元件和对准元件相对于磁带头的磁轴具有固定取向。可以使用标准微电子光刻工艺在带头上制造对准元件和写入元件。优选地，带头包括多个对准元件。这些对准元件可操作以将对准转变写入到介质上。可以观察对准转换以确定它们是否表示相对于输送方向具有预定取向的写入元件。读取换能器可用于从对准转换产生信号，并且可以分析这些信号以确定是否已经实现了写入元件的预定取向。带头可以包括水平和/或垂直元件，用于将磁带头与介质的总体视觉对准。对齐转换可以由单独数据头的数据元素读取。可以使用来自数据元素的信号来相对于传送方向调整数据头的方位角。在伺服写入器应用中，伺服代码被预先记录在介质上，对准转换可用于将伺服写入头的写入元件与介质的传输方向对齐，以使相邻伺服带之间的带间偏移明显减小。

18. 发明授权

US06806969B2 Optical measurement for measuring a small space through a transparent surface 有权
标题翻译：通过透明表面测量小空间的光学测量
公开(公告)号：US06806969B2
公开(公告)日：2004-10-19
申请号：US10039599
申请日：2001-10-19
申请人： George M. Clifford, Jr. , William Gong
发明人： George M. Clifford, Jr. , William Gong
IPC分类号： G01B1128
CPC分类号： G01B11/02 , G01B11/14
摘要： The invention provides a system and method for reliably and accurately measuring the gap between two materials when the depth of gap is less than the smallest distance that an optical thickness gauge (OTG) is able to measure. The invention is practiced by forming a suitable slot (or a groove, channel, hole or other suitable deformation) having a precisely known depth in at least one material. The sum of the distance of the gap and the depth of the slot is at least equal to the smallest distance that the OTG can measure. The slot is positioned over the materials and under the OTG probe head such that a cavity is formed. The depth of the cavity is measured. Since the distance of the slot is known, the depth of the gap is determined by subtracting the known depth of the slot from the measured depth of the cavity.
摘要翻译：本发明提供一种系统和方法，用于当间隙深度小于光学厚度计（OTG）能够测量的最小距离时，可靠且准确地测量两种材料之间的间隙。通过在至少一种材料中形成具有精确已知深度的合适的槽（或槽，通道，孔或其它合适的变形）来实现本发明。间隙的距离和槽的深度的总和至少等于OTG可以测量的最小距离。槽位于材料之上并且位于OTG探针头下方，使得形成空腔。测量腔的深度。由于槽的距离是已知的，所以间隙的深度通过从所测量的腔的深度减去槽的已知深度来确定。

19. 发明授权

US06229669B1 Servo head design and method of using the same 有权
标题翻译：伺服头设计及使用方法
公开(公告)号：US06229669B1
公开(公告)日：2001-05-08
申请号：US09449010
申请日：1999-11-24
申请人： Patricia A. Beck , Paul W. Poorman , George M. Clifford, Jr. , Richard H. Henze
发明人： Patricia A. Beck , Paul W. Poorman , George M. Clifford, Jr. , Richard H. Henze
IPC分类号： G11B5187
CPC分类号： G11B5/187 , G11B5/1871 , G11B5/4893 , G11B5/584 , G11B15/62 , Y10T29/49032 , Y10T29/49043 , Y10T29/49048 , Y10T29/49055 , Y10T29/4906 , Y10T29/49789 , Y10T29/49798
摘要： A servo head having a substantially planar head surface and a leading rounded edge is disclosed with a technique of utilizing the disclosed servo head to write to tape passing over the planar head surface, the tape separate from the servo head by an air bearing. The rounded leading edge on the head creates the air bearing to reduce wear of the tape and of the head. Moreover, any head wear occurs at the leading edge rather than in the region of the head where the servo pattern is formed. The servo write head may have a substantially planar head surface. A leading edge is disposed adjacent to the head surface such that the tape contacts the leading edge before passing over the head surface. The leading edge is rounded to form the air bearing between the head surface and the tape. A rounded trailing edge may be disposed adjacent to the head surface such that the tape passes over the trailing edge after passing over the head surface.
摘要翻译：公开了一种具有基本上平面的头表面和前圆形边缘的伺服头，其技术是利用所公开的伺服头来写入通过平面头表面的带子，该带通过空气轴承与伺服头分离。头部圆角的前缘产生空气轴承，以减少胶带和头部的磨损。此外，任何头部磨损发生在前缘而不是在形成伺服图案的头部的区域中。伺服写入头可以具有基本平坦的头表面。前缘邻近头表面设置，使得带在通过头表面之前接触前缘。前缘是圆形的，以形成头表面和胶带之间的空气轴承。圆形的后缘可以邻近头部表面设置，使得带在经过头表面之后越过后缘。

20. 发明授权

US6018444A Batch fabricated servo write head having low write-gap linewidth variation 失效
标题翻译：具有低写入间隙线宽变化的批量制造的伺服写入头
公开(公告)号：US6018444A
公开(公告)日：2000-01-25
申请号：US959509
申请日：1997-10-28
申请人： Patricia A. Beck , Paul W. Poorman , George M. Clifford, Jr. , Richard H. Henze
发明人： Patricia A. Beck , Paul W. Poorman , George M. Clifford, Jr. , Richard H. Henze
IPC分类号： G11B5/127 , G11B5/187 , G11B5/48 , G11B5/584 , G11B15/62 , G11B5/23
CPC分类号： G11B5/187 , G11B15/62 , G11B5/584 , G11B5/1871 , G11B5/4893 , Y10T29/49032 , Y10T29/49043 , Y10T29/49048 , Y10T29/49055 , Y10T29/4906 , Y10T29/49789 , Y10T29/49798
摘要： A batch fabrication technique is described that increases the manufacturing efficiency of servo write heads and also improves servo pattern definition for fine features, while reducing tape and head wear. Multiple heads are fabricated as a batch from one or more ferrite wafers. A nominally flat, large wafer surface and a contour suitable for uniform photoresist application and planar photolithography permit fine servo pattern definition with low linewidth variation. Non-magnetic material is photolithographically defined to produce gaps above the spacer. The non-magnetic material may be photoresist, semiconductor materials, glass, metal or the like. The material may even be removed later to leave air gaps. The non-magnetic material forms a region where the field loops out to intersect the passing tape, thereby transferring a magnetic pattern to tape. Additionally, a lower ferrite wafer may be mated to the upper ferrite wafer to complete a magnetic circuit around the gaps. The upper or lower ferrite wafer may have a channel through which an inductive winding passes. Multiple heads may be formed through batch processing of the upper and lower ferrite wafers.
摘要翻译：描述了一种批量制造技术，其提高了伺服写入头的制造效率，并且还改善了精细特征的伺服模式定义，同时减少了磁带和磁头磨损。多个头部从一个或多个铁氧体晶片制成批次。标称平坦，大的晶片表面和适用于均匀光刻胶应用和平面光刻的轮廓允许具有低线宽变化的精细伺服模式定义。非磁性材料被光刻定义以在间隔物上方产生间隙。非磁性材料可以是光致抗蚀剂，半导体材料，玻璃，金属等。材料甚至可以稍后移除以留下空隙。非磁性材料形成区域，其中磁场循环出来以与通过的磁带相交，从而将磁性图案转印到磁带上。此外，下部铁氧体晶片可以与上部铁氧体晶片配合，以在该间隙周围形成磁路。上或下铁素体晶片可以具有感应绕组通过的通道。可以通过上下铁素体晶片的批量处理形成多个头。

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