摘要:
An optical apparatus including an optical substrate having an embedded waveguide and an optical device adapted to receive light transmitted from an end of the waveguide. The optical apparatus includes a coupling structure for coupling the optical device to the substrate. The coupling structure has a thin metallic layer with an aperture. At least a portion of the optical device is disposed in the aperture. A method for making an optical apparatus comprising forming an optical substrate having a waveguide embedded therein; depositing a metal layer over an end of the waveguide; and depositing a polymeric layer over the metal layer. An aperture is formed in the metal layer and in the polymeric layer by removing a portion of the metal layer and a portion of the polymeric layer disposed over the end of the waveguide. The method for making an optical apparatus also comprises inserting at least a portion of an optical device within the aperture so that the optical device is positioned to receive light from the first end of the waveguide.
摘要:
A method for transferring devices to a device substrate is disclosed. In one embodiment, the method includes providing an array of devices on a carrier substrate having a generally horizontal surface, where the array comprises multiple device pluralities. The method includes tilting the device pluralities with respect to the generally horizontal surface of the carrier substrate. Each tilted device plurality is preferably in substantially the same pattern, and each tilted device plurality is placed on device regions on respective device substrates.
摘要:
Printed circuit substrates and electrical assemblies including a conductive composition are disclosed. The printed circuit substrate and the electrical assembly embodiments comprise a first conducting region and a second conducting region. A dielectric layer is disposed between the first and second conducting regions. An aperture is disposed in the dielectric layer and a via structure including the conductive composition is disposed in the aperture. The conductive composition is preferably in a cured state and electrically communicates with the first and second conducting regions. In preferred embodiments, the conductive composition comprises conductive particles in an amount of at least about 75 wt. % based on the weight of the composition. At least 50% by weight of the conductive particles have melting points of less than about 400.degree. C. The composition further includes a carrier including an epoxy-functional resin in an amount of at least about 50 wt. % based on the weight of the carrier, and a fluxing agent in an amount of at least about 0.1 wt % based on the weight of the carrier. The epoxy functional resin can have a viscosity of less than about 1000 centipoise at 25.degree. C.
摘要:
Methods for making circuit substrates and electrical assemblies are disclosed. A conductive composition is disposed between confronting conductive regions and can be cured to form a via structure. The conductive composition includes conductive particles and a carrier. The carrier can include a fluxing agent and an epoxy-functional resin having a viscosity of less than about 1000 centipoise at 25° C.
摘要:
Improved methods and articles used to fabricate flexible circuit structures are disclosed. The methods include depositing a release layer or a dielectric film on a substrate, and then forming a conductive laminate on the release layer or the dielectric film. The conductive laminate may be easily separated by the substrate to eventually form a flexible circuit structure. Plasma may be used to treat a surface of the release layer or the dielectric film to produce a plasma-treated surface to lower the peel strength of any film or layer bound to the plasma-treated surface.
摘要:
Improved methods and articles used to fabricate flexible circuit structures are disclosed. The methods include depositing a release layer or a dielectric film on a substrate, and then forming a conductive laminate on the release layer or the dielectric film. The conductive laminate may be easily separated by the substrate to eventually form a flexible circuit structure.
摘要:
Structures, methods and materials for making multilayer circuit substrates are disclosed. The structures include bumped structures or microencapsulated conductive particles suitable for use in a lamination process to make a multilayer printed circuit substrate.
摘要:
A method for joining large area semiconductor substrates, a liquid thermoset polymer. Two large area substrates, such as wafers or circuit boards (e.g., rigid or flexible), can be joined together by dispensing a liquid polymer inwardly from the edges of the semiconductor substrates. The substrates can then be pressed together so that the liquid thermoset flows in an outwardly direction ward the edges of the semiconductor substrates. Conducting surfaces on the first and second substrates may contact each other after pressing the liquid thermoset polymer. The liquid thermoset polymer in the formed structure may then be cured to a hardened state. The liquid thermoset polymer preferable has a low viscosity, low levels of ionic contaminants, good adhesion to the substrates, low moisture absorbing properties and favorable thermal expansion properties.
摘要:
A method for deplating defective capacitors comprising forming a plurality of capacitors on a semiconductor substrate, forming a plurality of metal contacts on the plurality of capacitors, and depositing a layer of photoresist on the semiconductor substrate. The photoresist layer is patterned so that the plurality of metal contacts are exposed, which are then contacted with an electrically conductive solution. The metal contacts, which are disposed over defective capacitors, are subsequently deplated. A method for forming a multi-chip module comprising forming a thin-film polymeric interconnect structure having a pair of sides, one of which is disposed on a silicon substrate having active or passive devices and the other of which has a computer chip mounted thereon. A multi-chip module formed by the method.