公开(公告)号：US5191354A

公开(公告)日：1993-03-02

申请号：US838617

申请日：1992-02-19

Applicant: Calvin F. Quate

Inventor： Calvin F. Quate

IPC: B41J2/045 ,  B41J2/055 ,  B41J2/14

CPC classification number: B41J2/14008 ,  B41J2002/14322

Abstract: The ejection of droplets in an ink jet printer is accompanied by the generation of capillary waves that spread out radially from the central region where the drops are ejected. These capillary waves interfere with the ejection of succeeding droplets. In order to suppress these capillary waves, the pressure in the pool of liquid feeding the printer is varied periodically at twice the maximum repetition rate of droplet ejection.

公开(公告)号：US5132934A

公开(公告)日：1992-07-21

申请号：US668320

申请日：1991-03-13

Applicant: Calvin F. Quate ,  Robert C. Barrett

Inventor： Calvin F. Quate ,  Robert C. Barrett

IPC: G11B9/00 ,  G11B9/08 ,  G11B9/14

CPC classification number: G11B9/08 ,  G11B9/14 ,  G11B9/1445 ,  G11B9/1472 ,  B82Y10/00 ,  Y10S977/947

Abstract: Method and apparatus for storing digital information in a dense memory structure. A semiconductor substrate has a thin insulating layer formed thereon. Over the thin insulating layer is formed a dielectric charge-storage layer. A piezoelectric bimorph cantilever arm has a tip formed at its free end to access certain memory sites defined by charge-storage regions in the charge-storage layer. To write infromation in the form of charges into a memory site the tip contacts or is in close proximity to the surface of the charge-storage layer and an electric field is applied between the tip and the substrate to induce charges to tunnel through the thin insulating layer into the charge-storage layer where the charges are stored as trapped charges. Information is read from a storage-site by spacing the tip of the cantilever arm a distance from the surface of the charge storage layer and applying an electric field between the tip and the substrate. The capacitive force on the tip is then measured to determine the amount of charge stored in that memory site. Alternatively charge is deposited directly on the surface of a single insulating layer. Charge sites are arranged in circular tracks on a rotating substratge to provide a high density memory array. Charge sites are also arranged in linear tracks by forming alternating layers of conductive and non-conductive substrate layers over which are formed thin insulating layers and charge-storage layers. This produces a number of spaced-apart charge-storage tracks. Tracks are also provided by depositing metal strips or scribing grooves on the surface of a device.

Abstract translation: 用于在密集存储器结构中存储数字信息的方法和装置。 半导体衬底在其上形成有薄的绝缘层。 在薄绝缘层上形成介电电荷存储层。 压电双晶片悬臂具有在其自由端形成的尖端，以接入由电荷存储层中的电荷存储区限定的某些存储位置。 为了以电荷的形式将信息写入存储器位置，尖端接触或紧邻电荷存储层的表面，并且在尖端和衬底之间施加电场以诱导电荷穿过薄绝缘体 层进入电荷存储层，其中电荷作为被捕获的电荷被存储。 通过将悬臂的尖端与电荷存储层的表面间隔一定距离并在尖端和衬底之间施加电场，从存储位置读取信息。 然后测量尖端上的电容力以确定存储在该存储器位置中的电荷量。 或者，电荷直接沉积在单个绝缘层的表面上。 电荷位置以旋转的子区域的圆形轨迹布置，以提供高密度存储器阵列。 电荷位置也通过形成导电和非导电衬底层的交替层而布置在线性轨道中，在其上形成薄的绝缘层和电荷存储层。 这产生了多个间隔开的电荷存储轨道。 还通过在设备的表面上沉积金属条或划线槽来提供轨道。

公开(公告)号：US5028937A

公开(公告)日：1991-07-02

申请号：US358752

申请日：1989-05-30

Applicant: Butrus T. Khuri-Yakub ,  Scott A. Elrod ,  Calvin F. Quate ,  Eric G. Rawson ,  Babur B. Hadimioglu

Inventor： Butrus T. Khuri-Yakub ,  Scott A. Elrod ,  Calvin F. Quate ,  Eric G. Rawson ,  Babur B. Hadimioglu

IPC: B41J2/045 ,  B41J2/015 ,  B41J2/055 ,  B41J2/14 ,  G01D15/16

CPC classification number: B41J2/14008 ,  B41J2002/14322

Abstract: In accordance with the present invention, an acoustic ink printer comprises a pool of liquid ink having a free surface in intimate contact with the inner face of a perforated membrane. The printer addresses all pixel positions within its image field via substantially uniform, relatively large diameter apertures which extend through the membrane on centers that are aligned with respective ones of the pixel positions. In operation, one or more focused acoustic beams selectively eject individual droplets of ink from the ink menisci that extend across the apertures. Accordingly, the membrane is positioned and the bias pressure that is applied to the ink is selected so that the menisci essentially remain within the focal plane of such beam or beams.

公开(公告)号：US4959674A

公开(公告)日：1990-09-25

申请号：US416796

申请日：1989-10-03

Applicant: Butrus T. Khri-Yakub ,  Scott A. Elrod ,  Calvin F. Quate

Inventor： Butrus T. Khri-Yakub ,  Scott A. Elrod ,  Calvin F. Quate

IPC: B41J2/015 ,  B41J2/14 ,  B41J2/385 ,  H04R1/34

CPC classification number: B41J2/14008 ,  B41J2002/14322

Abstract: An acoustic ink printhead having improved ink drop ejection control includes a substrate having an array of acoustic lenses at its upper surface for bringing rf acoustic waves to a predetermined focus and a layer of acoustically reflective material of a thickness equal to an odd multiple of one quarter of the wavelength of the acoustic rf waves passing through it having openings corresponding to and positioned above each lens. Ink from an ink pool is allowed to couple acoustically to the lenses at each opening for receiving the focussed acoustic rf wave, while the layer acoustically isolates the interstitial regions between each lens by reflecting the acoustic rf waves incident on the upper surface of the substrate in those regions.

公开(公告)号：US4751534A

公开(公告)日：1988-06-14

申请号：US944145

申请日：1986-12-19

Applicant: Scott A. Elrod ,  Butrus T. Khuri-Yakub ,  Calvin F. Quate

Inventor： Scott A. Elrod ,  Butrus T. Khuri-Yakub ,  Calvin F. Quate

IPC: B41J2/045 ,  B41J2/015 ,  B41J2/055 ,  B41J2/14 ,  G01D15/16

CPC classification number: B41J2/14008 ,  B41J2002/14322

Abstract: The output surface of an acoustic printhead having one or more concave acoustic beam forming devices for supplying focused acoustic beams to eject droplets of ink on demand from the surface of a pool of ink is planarized by filling those concave devices with a solid material having an acoustic impedance and an acoustic velocity which are intermediate the acoustic impedance and the acoustic velocity, respectively, of the ink and of the printhead. This not only facilitates the cleaning of the printhead, but also eliminates the edges upon which an optional ink transport or the like may tend to drag. The outer surface of the filler may be essentially flush with the face of the printhead, or the filler may overcoat the printhead.

公开(公告)号：US4751530A

公开(公告)日：1988-06-14

申请号：US944698

申请日：1986-12-19

Applicant: Scott A. Elrod ,  Butrus T. Khuri-Yakub ,  Calvin F. Quate

Inventor： Scott A. Elrod ,  Butrus T. Khuri-Yakub ,  Calvin F. Quate

IPC: B41J2/045 ,  B41J2/015 ,  B41J2/055 ,  B41J2/14 ,  B41J2/155 ,  G01D15/16

CPC classification number: B41J2/14008 ,  B41J2/155 ,  B41J2002/14322

Abstract: To facilitate the fabrication of acoustic printheads, arrays of spherical acoustic lenses are provided for bringing rf acoustic waves to essentially diffraction limited focii at or near the free surface of a pool of ink. These lenses produce focal patterns which are relatively free of localized amplitude variations, so they may be employed to fabricate acoustic printheads having relatively stable characteristics for acoustic printing.

公开(公告)号：US4719480A

公开(公告)日：1988-01-12

申请号：US853253

申请日：1986-04-17

Applicant: Scott A. Elrod ,  Butrus T. Khuri-Yakub ,  Calvin F. Quate

Inventor： Scott A. Elrod ,  Butrus T. Khuri-Yakub ,  Calvin F. Quate

IPC: B41J2/01 ,  B41J2/015 ,  B41J2/05 ,  B41J2/06 ,  B41J2/065 ,  G10K11/36 ,  G01D15/16

CPC classification number: B41J2/065 ,  G10K11/36 ,  B41J2002/14322

Abstract: Provision is made spatially stabilizing standing capillary surface waves in fixed and repeatable locations with respect to stationary external references. For spatially stabilizing such a wave on the free surface of a volume of liquid, the wave propagation characteristics of the free surface of liquid are periodically varied in a spatially stable manner at a spatial frequency equal to the spatial frequency of the standing wave or a subharmonic thereof, thereby locking the crests and troughs of the standing wave in predetermined spatial locations. A spatially periodic pattern of notches in a wall or base plate bounding the free surface of the liquid may be employed to physically modulate its wave propagation characteristics at a suitable spatial frequency. Alternatively freely propagating secondary capillary surface waves may be launched from spatially periodic sites along the free surface of the liquid to actively modulate its wave propagation characteristics at the diesired spatial frequency.

Abstract translation: 在固定和可重复的位置相对于固定的外部参考，使空间稳定站立的毛细管表面波。 为了在一定体积的液体的自由表面上空间稳定这样的波，液体的自由表面的波传播特性以空间频率周期性地变化，空间频率等于驻波的空间频率或次谐波 从而将驻波的波峰和波谷锁定在预定的空间位置。 可以采用限定液体自由表面的壁或底板中的凹口的空间周期性图案，以在合适的空间频率物理地调制其波传播特性。 可选地，自由传播的次级毛细管表面波可以沿着液体的自由表面从空间周期性位置发射，以在去除的空间频率上主动调制其波传播特性。