-
公开(公告)号：US5389428A
公开(公告)日：1995-02-14
申请号：US987515
申请日：1992-12-08
申请人： Debra A. Fleming , Gideon S. Grader , David W. Johnson, Jr. , Henry M. O'Bryan, Jr. , Warren W. Rhodes
发明人： Debra A. Fleming , Gideon S. Grader , David W. Johnson, Jr. , Henry M. O'Bryan, Jr. , Warren W. Rhodes
IPC分类号： C04B35/622 , C04B35/26 , C04B41/87 , H01F17/00 , H01F17/04 , H01F27/02 , H01F41/16 , H01G4/12 , H01F41/02
CPC分类号： H01F17/0033 , H01F17/0013 , H01F17/04 , H01F27/027 , H01F41/16 , H01F2017/048 , Y10S428/90 , Y10T428/24917
摘要： This invention is predicated upon applicants' discovery that conventional techniques for minimizing metal loss from sintered ceramic materials are not adequate in the fabrication of small ceramic components such as multilayer monolithic magnetic devices wherein a magnetic core is substantially surrounded by an insulating housing. Applicants have determined that this metal loss problem can be solved by providing the component with a housing layer having an appropriate concentration of metal. Specifically, if the insulating housing material around the magnetic core has, during the high temperature firing, the same partial pressure of metal as the magnetic core material, there is no net loss of metal from the core. In a preferred embodiment, loss of zinc from a MnZn ferrite core is compensated by providing a housing of NiZn ferrite or zinc aluminate with appropriate Zn concentrations. Similar considerations apply to other ceramic components.
摘要翻译： 本发明基于申请人的发现，用于最小化烧结陶瓷材料的金属损耗的常规技术在制造小型陶瓷部件如多层单片磁性器件中是不够的，其中磁芯基本上被绝缘壳体包围。 申请人已经确定，通过为组件提供具有适当浓度金属的容纳层，可以解决该金属损失问题。 具体来说，如果磁芯周围的绝缘壳体材料在高温烧成时具有与磁心材料相同的金属分压，则不存在来自芯的金属的净损耗。 在优选的实施方案中，通过提供具有合适的Zn浓度的NiZn铁氧体或铝酸锌的壳体来补偿来自MnZn铁氧体磁心的锌的损失。 类似的考虑也适用于其他陶瓷组件。
-
公开(公告)号：US5239744A
公开(公告)日：1993-08-31
申请号：US818669
申请日：1992-01-09
CPC分类号： H01F41/16 , B28B1/48 , B28B7/342 , Y10T29/4902 , Y10T29/49833
摘要： Multilayer magnetic components can be made with reduced cracking and magnetic degradation by forming layers having patterns of magnetic and insulating regions separated by regions that are removable during sintering. Advantageously, when the layers are stacked, layers of removable material are also disposed between magnetic regions and insulating regions so as to produce upon sintering a magnetic core within an insulating body wherein the core is substantially completely surrounded by a thin layer of free space.
-
公开(公告)号：US5349743A
公开(公告)日：1994-09-27
申请号：US695653
申请日：1991-05-02
CPC分类号： H01F41/16 , H01F17/0033 , Y10T29/4902
摘要： Magnetic components are fabricated as monolithic structures using multilayer co-fired ceramic tape techniques. Fabrication of these magnetic components involves constructing multiple layers of a magnetic material and an insulating non-magnetic mataerial to form a monolithic structure with well defined magnetic and insulating non-magnetic regions. Windings are formed using screen printed conductors connected through the multilayer structure by conducting vias.
摘要翻译： 使用多层共烧陶瓷带技术将磁性部件制成为整体式结构。 这些磁性部件的制造涉及构造多层磁性材料和绝缘非磁性材料以形成具有良好限定的磁性和绝缘非磁性区域的整体结构。 通过导电通孔，通过多层结构连接的丝网印刷导体形成绕线。
-
公开(公告)号：US5479695A
公开(公告)日：1996-01-02
申请号：US270197
申请日：1994-07-01
CPC分类号： H01F41/16 , H01F17/0033 , Y10T29/4902
摘要： Magnetic components are fabricated as monolithic structures using multilayer co-fired ceramic tape techniques. Fabrication of these magnetic components involves constructing multiple layers of a magnetic material and an insulating non-magnetic material to form a monolithic structure with well defined magnetic and insulating non-magnetic regions. Windings are formed using screen printed conductors connected through the multilayer structure by conducting vias.
摘要翻译： 使用多层共烧陶瓷带技术将磁性部件制成为整体式结构。 这些磁性部件的制造涉及构造多层磁性材料和绝缘非磁性材料，以形成具有良好限定的磁性和绝缘非磁性区域的整体结构。 通过导电通孔，通过多层结构连接的丝网印刷导体形成绕线。
-
5.发明授权Manufacture of vitreous silica product via a sol-gel process using a polymer additive 失效使用聚合物添加剂通过溶胶 - 凝胶法生产玻璃状二氧化硅产品
公开(公告)号：US5240488A
公开(公告)日：1993-08-31
申请号：US930125
申请日：1992-08-14
申请人： Edwin A. Chandross , Debra A. Fleming , David W. Johnson, Jr. , John B. MacChesney , Frederick W. Walz, Jr.
发明人： Edwin A. Chandross , Debra A. Fleming , David W. Johnson, Jr. , John B. MacChesney , Frederick W. Walz, Jr.
IPC分类号： B29C39/02 , B29K67/00 , B29L11/00 , C03B8/02 , C03B19/12 , C03B20/00 , C03B37/012 , C03B37/016 , C03C1/00 , G02B6/00
CPC分类号： C03B37/016 , C03B19/12 , C03B37/01211 , C03C1/006 , Y02P40/57 , Y10S65/901
摘要： Lowered cost fabrication including preparation of large bodies of void-free, high-silica glass, depends upon gellation of an aqueous sol of colloidal silica particles, followed by drying and firing of such gel. Freedom from cracks in the dried gel is the consequence of included polymeric material which wets the particles. The polymeric material is removed by thermal decomposition attended upon temperature attained in firing.
-
6.发明授权Vitreous silica product manufactured via a sol-gel process using a polymer additive 失效通过使用聚合物添加剂的溶胶 - 凝胶法制造玻璃状二氧化硅产品
公开(公告)号：US5379364A
公开(公告)日：1995-01-03
申请号：US115485
申请日：1993-08-31
申请人： Edwin A. Chandross , Debra A. Fleming , David W. Johnson, Jr. , John B. MacChesney , Frederick W. Walz, Jr.
发明人： Edwin A. Chandross , Debra A. Fleming , David W. Johnson, Jr. , John B. MacChesney , Frederick W. Walz, Jr.
IPC分类号： B29C39/02 , B29K67/00 , B29L11/00 , C03B8/02 , C03B19/12 , C03B20/00 , C03B37/012 , C03B37/016 , C03C1/00 , G02B6/00 , C03B19/06
CPC分类号： C03B37/016 , C03B19/12 , C03B37/01211 , C03C1/006 , Y02P40/57 , Y10S65/901
摘要： Lowered cost fabrication including preparation of large bodies of void-free, high-silica glass, depends upon gellation of an aqueous sol of colloidal silica particles, followed by drying and firing of such gel. Freedom from cracks in the dried gel is the consequence of included polymeric material which wets the particles. The polymeric material is removed by thermal decomposition attended upon temperature attained in firing.
摘要翻译： 降低的成本制造包括制备无孔隙的高硅石玻璃的大体积取决于胶体二氧化硅颗粒的水性溶胶的凝胶化，然后干燥和烧制这种凝胶。 干燥凝胶中没有裂缝是包含聚合物材料的结果，这些聚合物材料会使颗粒变湿。 通过在烧制中达到的温度下进行热分解除去聚合物材料。
-
公开(公告)号：US4775401A
公开(公告)日：1988-10-04
申请号：US63196
申请日：1987-06-18
IPC分类号： C03B37/012 , C03B37/014 , C03B37/016 , G02B6/00 , C03B37/023
CPC分类号： C03B37/016 , C03B37/01211 , C03B37/01446 , C03B2203/22
摘要： The disclosed method of producing optical fiber comprises providing a silica-based glass rod of diameter D that comprises a core region of effective diameter d surrounded by cladding material (D/d typcially>2) and a silica-based porous jacketing tube, inserting the glass core rod into the porous tube, consolidating the porous material and sintering the jacketing tube onto the core rod such that a substantially pore-free optical fiber preform results. Fiber is then drawn from the preform in the conventional manner. Consolidation and sintering is carried out at a temperature below the softening temperature of the material, typically
-
公开(公告)号：US5047369A
公开(公告)日：1991-09-10
申请号：US345924
申请日：1989-05-01
申请人： Debra A. Fleming , David W. Johnson, Jr. , Shobha Singh , LeGrand G. VanUitert , George J. Zydzik
发明人： Debra A. Fleming , David W. Johnson, Jr. , Shobha Singh , LeGrand G. VanUitert , George J. Zydzik
IPC分类号： C03C3/062 , C03C3/097 , H01L21/314 , H01L21/316
CPC分类号： H01L21/02129 , H01L21/02266 , H01L21/02282 , H01L21/02337 , H01L21/31625 , Y10S148/133 , Y10S438/902
摘要： This invention is directed to a process of producing semiconductor devices which involves deposition of protective glass layers by a particle beam technique from targets of phosphosilicate glass, as well as a process for production of such targets. The phosphosilicate glass containing 1-15 mole percent P.sub.2 O.sub.5 is produced by a sol/gel technique which involves mixing of a fumed silica, with a surface area of 50-400 m.sup.2 /g, preferably about 200 m.sup.2 /g, with phosphoric acid and water to form a sol with 20-55 wt. % silica, allowing it to gel, drying at ambient conditions, dehydrating at about 650.degree. C. in an atmosphere of an inert gas and chlorine and fluorine containing gases, heating up at a certain rate of from 100.degree. to 180.degree. C. per hour to a peak sintering temperature below 1200.degree. C. and cooling so as to produce amorphous and transparent glass suitable for use as a target. The glass layers are highly advantageous as encapsulating layers, diffusion barrier layers, etc., especially for optical type and semiconductor devices. Production of the phosphosilicate glass by the sol/gel technique is highly advantageous over the conventional melting technique, being faster and much less expensive than the latter.
-
公开(公告)号：US4605428A
公开(公告)日：1986-08-12
申请号：US637492
申请日：1984-08-03
IPC分类号： C03B19/12 , C03B37/016 , C03B19/06
CPC分类号： C03B19/12 , C03B37/016 , Y02P40/57
摘要： High silica glass is formed by sintering a dried gel. The gel has a pore size distribution such that at most about 5% of the total pore volume is contributed by pores having an effective pore diameter greater than about 0.5 .mu.m, and such that at least 10% of the total pore volume is contributed by pores having an effective pore diameter greater than about 0.02 .mu.m. This pore size distribution permits effective migration of fluid into, and out of, the gel, permits sintering at a lower temperature, and results in increased perfection of the glass. The pore size distribution can be achieved by appropriate comminution, e.g., ball-milling, of intermediate material. A novel process for forming high silica glass is also disclosed. The process comprises forming intermediate material by hydrolysis of one or more metal alkoxides, comminuting the intermediate material to produce colloidal particles, forming a sol by dispersing the particles in liquid, gelling the sol, drying the gel, and sintering the dried gel.
摘要翻译： 通过烧结干燥的凝胶形成高二氧化硅玻璃。 凝胶具有孔径分布，使得总孔体积的至多约5％由具有大于约0.5μm的有效孔径的孔贡献，并且使得总孔体积的至少10％由 具有大于约0.02μm的有效孔径的孔。 这种孔径分布允许流体有效地迁移到凝胶中并离开凝胶，允许在较低温度下进行烧结，并且导致玻璃的完全增加。 孔径分布可以通过中等材料的适当粉碎，例如球磨来实现。 还公开了一种用于形成高二氧化硅玻璃的新方法。 该方法包括通过一种或多种金属醇盐的水解形成中间体材料，粉碎中间体材料以产生胶体颗粒，通过将颗粒分散在液体中形成溶胶，胶凝，干燥凝胶和烧结干燥的凝胶。
-
公开(公告)号：US4531110A
公开(公告)日：1985-07-23
申请号：US301721
申请日：1981-09-14
IPC分类号： H01C7/04
CPC分类号： H01C7/046 , Y10T29/49085
摘要： Inexpensive Mn or Mg ferrites may be used as negative temperature coefficient thermistors. Fabrication of devices with the desired high temperature coefficients is facilitated by a processing method which forms a thin layer of oxidized and high resistivity material on a low resistivity layer of ferrite material.
摘要翻译： 廉价的Mn或Mg铁氧体可用作负温度系数热敏电阻。 通过在铁氧体材料的低电阻率层上形成氧化和高电阻率材料的薄层的处理方法来促进具有期望的高温度系数的器件的制造。
-
-
-
-
-
-
-
-
-
搜索结果
27 条记录 (耗时 0.027 秒)