摘要:
A microcircuit article of manufacture comprises an electrical conductor electrically connected to both a first microcircuit element at a site comprising a first connector site having a first connector site axis and a second microcircuit element at a site comprising a second connector site having a second connector site axis. The first microcircuit element and the second microcircuit element are separated by and operatively associated with a layer comprising a first electrical insulator, whereas the conductor and the first microcircuit element are separated by and operatively associated with a layer comprising a second electrical insulator. At least one of the first electrical insulator layer and the second electrical insulator layer comprise a polymeric electrical insulator. In another embodiment, both electrical insulator layers comprise polymeric insulator layers. The microcircuit includes a UBM and solder connection to a FBEOL via opening. Sufficiently separating the first connector site axis and the second connector site axis so they are not concentric decouples the UBM and solder connection to the FBEOL via opening to substantially eliminate or minimize inter alia, electromigration and the white bump problem typical of lead free solders employed in C4 systems. A process comprises manufacturing this type of microcircuit article.
摘要:
Conducting liquid crystal polymer matrix comprising carbon nanotubes aligned in the matrix is provided, along with use thereof and method of fabrication.
摘要:
A solder joint comprising a solder capture pad on a substrate having a circuit; and a lead free solder selected from the group comprising Sn—Ag—Cu solder and Sn—Ag solder adhered to the solder capture pad; the solder selected from the group comprising between 0.1 to 2.0% by weight Sb or Bi, and 0.5 to 3.0% Ag. Formation of voids at an interface between the solder and the solder capture pad is suppressed, by including Zn. Interlayer dielectric delamination is suppressed, and electromigration characteristics are greatly improved. Methods for forming solder joints using the solders.
摘要:
A structure, and method of forming and cooling the structure. The structure may include a substrate (e.g., a semiconductor chip) having N continuous substrate channels and an interposer having N continuous interposer channels (N≧2). The N interposer channels are coupled to the N substrate channels to form M continuous loops (1≦M≦N). The M loops may transfer heat from a heat source within the substrate to the interposer and then to a heat sink thermally coupled to the interposer. The structure may include an interposer having a thermally conductive enclosure surrounding a cavity. The cavity contains a thermally conductive foam material (e.g., graphite foam). The foam material contains a serpentine channel having contiguously connected channel segments. The serpentine channel may transfer heat from a heat source within a substrate (e.g., a semiconductor chip) to the interposer and then to a heat sink thermally coupled to the interposer.
摘要:
A liquid crystal (LC) lightvalve comprising a twisted nematic LC layer whose molecules are aligned with pixel edges at the mirror backplane, thereby providing improved contrast and efficiency, and reduced visibility of post spacers in black state. The present invention is directed to an LC structure wherein the backplane is rubbed in a direction rectilinear with pixel edges. The LC layer is given the same twist rotation and birefringence as in the conventional TN lightvalve. Polarization control is maintained by illuminating the lightvalve with light whose polarization is rotated by the twist angle relative to the x,y, pixel axes, and by collecting the orthogonally polarized component of the reflected light. The lightvalve top glass is thus rubbed in a direction which is rotated by the twist angle from the horizontal or vertical direction at which the backplane is rubbed.
摘要:
A structure (and method) for a reflective-type liquid crystal display includes a first-type electrode, a second-type electrode positioned opposite the first-type electrode and being of an opposite type than the first-type electrode and a liquid crystal material between the first-type electrode and the second-type electrode, wherein at least one of the first-type electrode and the second-type electrode includes an amorphous layer adjacent the liquid crystal material.
摘要:
A reflective liquid crystal lightvalve for modulating the polarization of incident light within a specified band of wavelengths into on and off states, comprises: (i) a pixelated reflective backplane; (ii) a first liquid crystal layer, positioned proximate the pixelated reflective backplane, the first liquid crystal layer being tuned in the off state to switch incident light at the center of the specified band of wavelengths into a state that is not fully off; and (iii) a second liquid crystal layer, positioned proximate the first liquid crystal layer wherein the first liquid crystal layer is positioned between the second liquid crystal layer and the pixelated reflective backplane, the second liquid crystal layer having a birefringence which, at a given depth within its thickness, is substantially equal and opposite to a birefringence of a layer within the first liquid crystal layer that is located at a matching distance from a midplane separating the first and second liquid crystal layers.
摘要:
A twist discotic-type liquid-crystal or liquid-crystalline film with negative birefringence is as a compensation film for either single-domain or two-domain liquid crystal display cells to achieve better view-angle characteristics, less color-shift as a function of applied voltage, and faster response times than uncompensated 90°-twist single-domain or two-domain cells.
摘要:
A reflective liquid crystal cell for AMLCDs is provided wherein the reflective electrode may be passivated with an insulating film such as silicon oxide. In addition, the liquid crystal cell of the present invention may include a conducting transparent electrode that has a work function substantially equal to the work function of the reflective electrode in the cell. The reflective electrode may include a transparent conductive layer such as ITO, or may include an integer number of film pairs, wherein the film pair comprises a first dielectric film having a low index of refraction and a second dielectric film having a high index of refraction.
摘要:
A display device (10) having first and second substrates (12) and (30) and a layer of a PSCT or PFCT liquid crystal material disposed therebetween. The display is driven by an addressing scheme in which voltages are applied either in phase or out of phase in order to switch the liquid crystal material between stable states.