摘要:
In a surface acoustic wave element according to an embodiment of this invention, raised electrodes 20 formed on thin film electrodes 18 are provided with throughholes 31. Additionally, bumps 26 arranged on the raised electrodes 20 reach the thin film electrode 18 by going through an oxide film 18a of the thin film electrodes 18 after part of the bumps enters the throughholes 31 of the raised electrodes 20. By doing this, conduction is achieved between the thin film electrodes 18 and the bumps 26 formed on a piezoelectric monocrystal substrate 28. Thus, a solid oxide film 18a is formed on the surface of the thin film electrodes 18 formed from monocrystal aluminum, but part of the bumps 26 which enters the throughholes 31 of the raised electrodes 20 goes through this oxide film 18a, so conduction between the thin film electrode 18 and the bump 26 is achieved with higher accuracy.
摘要:
A basic portion layer 21 of a substrate electrode 12a connected to a projecting electrode 13 electrically and mechanically on a substrate member of ceramics. The substrate member on which the basic portion layer 21 is formed is subjected to sintering. A surface of the basic portion layer 21 in the sintered substrate member is polished. On the polished basic portion layer 21, the plating layers 22, 23. are formed, so that surface roughness of the substrate electrode 12a may be, for example, not larger than 0.1 μmRMS Accordingly, junction strength of an integrated circuit element mounted on a packaging substrate by a flip-chip method can be improved.
摘要:
A compact and wide band surface acoustic wave device for intermediate-frequency is disclosed. A piezoelectric substrate for use in a surface acoustic wave device having high electromechanical coupling factor and low SAW velocity is also disclosed. The surface acoustic wave device is constituted of a piezoelectric substrate 1 and inter-digital electrodes 2, 2 formed on the piezoelectric substrate 1. The piezoelectric substrate 1 has a crystal structure of Ca3Ga2Ge4O14 and is represented by the chemical formula, Sr3NbGa3Si2O14. A cut angle of the piezoelectric substrate 1 cut out of the single crystal and a direction of propagation of surface acoustic waves on the piezoelectric substrate represented in terms of Euler's angles (&phgr;, &thgr;, &psgr;) are found in one of a first area represented by −5°≦&phgr;≦15°, 0°≦&thgr;≦180°, and −50°≦&psgr;≦50° and a second area represented by 15°≦&phgr;≦30°, 0°≦&thgr;≦180°, and −40°≦&psgr;≦40°.
摘要翻译:公开了一种用于中频的紧凑且宽带的声表面波装置。 还公开了一种用于具有高机电耦合系数和低SAW速度的表面声波装置中的压电基片。声表面波装置由压电基片1和形成在压电基片1上的数字间电极2,2构成 压电基板1具有Ca 3 Ga 2 Ge 4 O 14的晶体结构,由化学式Sr 3 Nb Ga 3 Si 2 O 14表示。 由欧姆角(phi,θ,psi)表示的压电基片1从单晶切割的角度和表面声波的传播方向在欧拉角(phi,θ,psi)表示的第一区域中, -5°<= phi <= 15°,0°<=θ<= 180°,-50°<= psi <= 50°,第二区由15°<= phi <= 30°,0° <=θ<= 180°,-40°<= psi <= 40°。
摘要:
A hardening agent for epoxy resins comprising an amideamine compound which is a reaction product between (A) a polyamine mainly comprising a compound represented by the formula: ##STR1## wherein n represents 1 or 2, which is obtained by reacting m-xylylenediamine and epichlorohydrin, and (B) a carboxylic acid.
摘要:
A process for the preparation of a modified aromatic hydrocarbon resin which comprises reacting an aromatic hydrocarbon-formaldehyde resin with an unsaturated polybasic acid or an anhydride thereof, together with a saturated polybasic acid or an anhydride thereof if necessary, in the presence or absence of water, while introducing steam into the reaction system to remove by-produced formaldehyde out of the reaction system, and reacting the formed reaction product with at least one dihydroxy compound selected from the group consisting of (A) a glycol and (B) a hydroxy-terminated oligomer obtained by reacting a glycol with an unsaturated polybasic acid or an anhydride thereof; the cured product of the modified aromatic hydrocarbon resin being excellent in mechanical strength and resistance to water and alkalis.
摘要:
A basic portion layer 21 of a substrate electrode 12a connected to a projecting electrode 13 electrically and mechanically on a substrate member of ceramics. The substrate member on which the basic portion layer 21 is formed is subjected to sintering. A surface of the basic portion layer 21 in the sintered substrate member is polished. On the polished basic portion layer 21, the plating layers 22, 23 are formed, so that surface roughness of the substrate electrode 12a may be, for example, not larger than 0.1 μmRMS. Accordingly, junction strength of an integrated circuit element mounted on a packaging substrate by a flip-chip method can be improved.
摘要:
In a surface acoustic wave element according to an embodiment of this invention, raised electrodes 20 formed on thin film electrodes 18 are provided with throughholes 31. Additionally, bumps 26 arranged on the raised electrodes 20 reach the thin film electrode 18 by going through an oxide film 18a of the thin film electrodes 18 after part of the bumps enters the throughholes 31 of the raised electrodes 20. By doing this, conduction is achieved between the thin film electrodes 18 and the bumps 26 formed on a piezoelectric monocrystal substrate 28. Thus, a solid oxide film 18a is formed on the surface of the thin film electrodes 18 formed from monocrystal aluminum, but part of the bumps 26 which enters the throughholes 31 of the raised electrodes 20 goes through this oxide film 18a, so conduction between the thin film electrode 18 and the bump 26 is achieved with higher accuracy.
摘要:
The invention is to realize a surface acoustic wave device that attains a wide band and a small size, and lowers a loss by utilizing the natural single-phase unidirectional transducer characteristics. The surface acoustic wave device comprises a piezoelectric substrate (1) and a pair of interdigitated electrodes (2) provided on one main surface of the piezoelectric substrate 1. As the material of the piezoelectric substrate (1), a single crystal is used that belongs to the point group 32, has the Ca3Ga2Ge4O14 type crystalline structure, comprises La, Ta, Ga and O as main components, and is represented by a chemical formula La3Ta0.5Ga5.5O14. When the cut angle of the substrate (1) and the propagation direction are represented by Eulerian angles (&phgr;, &thgr;, &psgr;), &phgr;, &thgr; and &psgr; are in a first region where &phgr; is from −5° to 5°, &thgr; is from 135° to 155°, and &psgr; is from 15° to 40°, or in a second region where &phgr; is from 10° to 20°, &thgr; is from 140° to 157°, and &psgr; is from 30° to 60°.
摘要翻译:本发明旨在实现一种具有宽带和小尺寸的表面声波器件,并且通过利用天然单相单向传感器特性降低损耗。声表面波器件包括压电基片(1)和一对 设置在压电基板1的一个主表面上的交错电极(2)。作为压电基板(1)的材料,使用属于点组32的单晶,具有Ca 3 Ga 2 Ge 4 O 14型晶体结构,包括La ,Ta,Ga和O为主要成分,由化学式La3Ta0.5Ga5.5O14表示。 当基板(1)的切割角度和传播方向由欧拉角(phi,θ,psi)表示时,phi,θ和psi在第一区域,其中phi为-5°至5°,θ为 从135°至155°,psi为15°至40°,或在第二区域,其中phi为10°至20°,θ为140°至157°,psi为30°至60° 。
摘要:
An object of the invention is to provide a SAW device having an electrode film on a lithium tantalate substrate having a cut angle approximate to 36 degree rotated Y cut, the electrode film including an aluminum single crystal film having improved power durability. The SAW device has interdigital electrodes on a substrate. The substrate is constructed of a 38 to 44 degree rotated Y cut lithium tantalate single crystal, each interdigital electrode includes a titanium film and an aluminum film formed thereon, and the aluminum film is a single crystal film which develops only spots on selected area electron diffraction analysis.
摘要:
The present invention provides a piezoelectric substrate for a surface acoustic wave device which has high electromechanical coupling coefficient and low SAW velocity, and a surface acoustic wave device using the same. The present invention applies a single crystal comprising belonging to a point group 32 and having Ca3Ga2Ge4O14 type crystal structure. The basic component of the single crystal is comprised of La, Sr, Ta, Ga and O and is represented by the chemical formula: La3−xSrxTa0.5+0.5xGa5.5−0.5xO14. The composition ratio of Sr is preferably in the range of 0 x≦0.15, and more preferably in the range of 0.07 x≦0.08. The present invention also provides a surface acoustic wave device using that in which an interdigital finger electrode is formed in one main surface of the aforementioned piezoelectric substrate. When a cut angle of the substrate cut out of the single crystal and a propagation direction of surface acoustic waves are represented in terms of Euler angles (&phgr;, &thgr;, &psgr;), adequate characteristics can be obtained by selecting these angles.
摘要翻译:本发明提供了一种具有高机电耦合系数和低SAW速度的表面声波装置的压电基片和使用该压电基片的表面声波装置。 本发明应用包含属于点组32并具有Ca 3 Ga 2 Ge 4 O 14型晶体结构的单晶。 单晶的基本成分由La,Sr,Ta,Ga和O组成,由化学式La3-xSrxTa0.5 + 0.5xGa5.5-0.5xO14表示。 Sr的组成比优选地在0℃的范围内。“CUSTOM-CHARACTER FILE =”20“ID =”CUSTOM-CHARACTER- 00001“/> x <= 0.15,更优选在0.07 x <= 0.08。 本发明还提供一种使用在上述压电基板的一个主表面上形成叉指指状电极的表面声波装置。 当从单晶切割的基板的切割角度和表面声波的传播方向以欧拉角(phi,θ,psi)表示时,通过选择这些角度可以获得足够的特性。