公开(公告)号：EP3971999A1

公开(公告)日：2022-03-23

申请号：EP21196617.1

申请日：2021-09-14

申请人： Rohm Co., Ltd.

发明人： SHIMOJI, Noriyuki ,  DATE, Tomohiro ,  ITO, Norikazu

IPC分类号： H01L41/08 ,  H01L41/187 ,  H01L41/316 ,  H03H9/02 ,  H03H9/17

摘要： A piezoelectric element includes a single crystal piezoelectric film (111) of aluminum nitride (AlN), wherein a full width at half maximum (FWHM) of a (002) diffraction peak is smaller than 1.0 degree. The AlN film is c-axis oriented, particularly suited for bulk acoustic wave (FBAR) or surface acoustic wave (SAW) devices, and may be formed on a base substrate (110), such as Si, SiC, and sapphire, by a chemical vapor deposition (CVD) or molecular beam epitaxy (MBE) process.

公开(公告)号：EP2042300B1

公开(公告)日：2013-09-11

申请号：EP07790699.8

申请日：2007-07-12

申请人： Rohm Co., Ltd.

发明人： YANO, Hiroyuki ,  NOGI, Masaya ,  ABE, Kentaro ,  IFUKU, Shinsuke ,  SHIMOJI, Noriyuki ,  OKU, Yoshiaki ,  OKUYAMA, Suguru

IPC分类号： B32B27/10 ,  B32B5/02 ,  D06M15/263 ,  D21H21/26

CPC分类号： D21H21/26 ,  Y10T428/26 ,  Y10T428/269 ,  Y10T442/20 ,  Y10T442/614

公开(公告)号：EP3961734A1

公开(公告)日：2022-03-02

申请号：EP20794409.1

申请日：2020-03-05

申请人： Rohm Co., Ltd.

发明人： KUROKAWA, Eitaro ,  SHIMOJI, Noriyuki ,  FUJIMORI, Yoshikazu

IPC分类号： H01L41/047 ,  H01L41/09 ,  B41J2/14

摘要： An inkjet printing head 1 includes a pressure chamber 5, a movable film formation layer 10 that includes a movable film 10A defining a top surface portion of the pressure chamber 5, and a piezoelectric element 6 that is formed to contact a surface of the movable film 10A at an opposite side from the pressure chamber 5 and having a peripheral edge receded further toward an interior of the pressure chamber 5 than the movable film 10A in plan view. The piezoelectric element 6 includes a lower electrode 7 formed on a surface of the movable film formation layer 10 at the opposite side from the pressure chamber 5, an upper electrode 9 disposed at an opposite side from the movable film formation layer 10 with respect to the lower electrode 7, and a piezoelectric film 8 provided between the upper electrode 9 and the lower electrode 7, and the upper electrode 9 has a thin portion 92 at least at a portion of a peripheral edge portion.

公开(公告)号：EP2042300A1

公开(公告)日：2009-04-01

申请号：EP07790699.8

申请日：2007-07-12

申请人： Rohm Co., Ltd. ,  Pioneer Corporation

发明人： YANO, Hiroyuki ,  NOGI, Masaya ,  ABE, Kentaro ,  IFUKU, Shinsuke ,  SHIMOJI, Noriyuki ,  OKU, Yoshiaki ,  OKUYAMA, Suguru

IPC分类号： B32B27/10 ,  B32B5/02 ,  D06M15/263 ,  D21H21/26

CPC分类号： D21H21/26 ,  Y10T428/26 ,  Y10T428/269 ,  Y10T442/20 ,  Y10T442/614

摘要： A highly transparent fiber composite material is provided that can be manufactured through a simplified process using reduced amounts of raw materials and that has high flexibility and low thermal expansivity and retains good functionality of the fiber material. The fiber composite material includes: a fiber assembly having an average fiber diameter of 4 to 200 nm and a 50 µm-thick visible light transmittance of 3% or more; and a coating layer that coats and smoothes the surface of the fiber assembly, wherein the fiber composite material has a 50 µm-thick visible light transmittance of 60% or more. With this fiber assembly, the scattering of light caused by the irregularities on the surface can be suppressed by coating the surface with the coating layer to smooth the surface, whereby a highly transparent fiber composite material can be obtained.

摘要翻译： 提供了一种高度透明的纤维复合材料，其可以通过使用减少量的原材料的简化工艺制造，并且具有高柔性和低热膨胀性并且保持纤维材料的良好功能。 纤维复合材料包括：平均纤维直径为4〜200nm，50μm厚的可见光透射率为3％以上的纤维集合体; 以及涂布所述纤维集合体的表面的涂层，其中所述纤维复合材料具有60μm以上的50μm的可见光透射率。 利用该纤维集合体，可以通过用涂层涂布表面来平滑表面的不规则性引起的光的散射，从而可以获得高透明性的纤维复合材料。