摘要:
A bond film includes a thermoplastic polyimide adhesive that contains particles which are thermally conductive and electrically conductive particles. A conductive foil layer may be placed between two layers of adhesive to form the bond foil. This bond film has a low curing temperature which reduces CTE mismatch between different substrates and therefore allows direct bonding of substrates that have high coefficient of thermal expansion mismatch. The low curing temperature also allows for reduced processing costs. The conductive bond film does not degrade at high temperatures, allowing for service temperatures up to 350°C and thermal excursions up to 450°C.
摘要:
A mask is formed over a first conductive portion of a conductive layer to expose a second conductive portion of the conductive layer. An electrolytic process is performed to remove conductive material from a first region and a second region of the second conductive portion. The second region is aligned with the mask relative to an electric field applied by the electrolytic process. The second region separates the first region of the second conductive portion from the first conductive portion. The electrolytic process is concentrated relative to the second region such that removal occurs at a relatively higher rate in the second region than in the first region.
摘要:
Provided are methods of making a transient electronic device by fabricating one or more inorganic semiconductor components, one or more metallic conductor components or one or more inorganic semiconductor components and one or more metallic conductor components supported by a mother substrate. The components may independently comprise a selectively transformable material and, optionally, further have a preselected transience profile. The components are transfer printed, thereby decoupling the component fabrication step from additional processing to provide desired device functionality and transient properties. A substrate layer is provided on top of the components and used to facilitate handling, processing, and/or device functionality.
摘要:
A through-silicon via fabrication method includes etching a plurality of through holes in a silicon plate. An oxide liner is deposited on the surface of the silicon plate and on the sidewalls and bottom wall of the through holes. A metallic conductor is then deposited in the through holes. In another version, which may be used concurrently with the oxide liner, a silicon nitride passivation layer is deposited on the exposed back surface of the silicon plate of the substrate.
摘要:
The present disclosure relates to forming multi - layered contact pads for a semiconductor device, wherein the various layers of the contact pad are formed using one or more thin - film deposition processes, such as an evaporation process. Each contact pad includes an adhesion layer, (20) which is formed over the device structure for the semiconductor device; a titanium nitride (TiN) barrier layer, (22) which is formed over the adhesion layer (24); and an overlay layer, which is formed over the barrier layer. At least the titanium nitride (TiN) barrier layer (22) is formed using an evaporation process.
摘要:
A through-substrate via (TSV) die (200) includes a plurality of TSVs (216) including an outer dielectric sleeve (221) and an inner metal core (220) and protruding TSV tips (217) including sidewalls that emerge from the TSV die. A passivation layer (231) lateral to the protruding TSV tips is on a portion of the sidewalls of the protruding TSV tips. The passivation layers is absent from a distal portion of the protruding TSV tips to provide an exposed portion of the inner metal core. The TSV tips include bulbous distal tip ends (217(a) including a first metal layer (241) including a first metal other than solder and a second metal layer (242) including a second metal other than solder that covers the exposed tip portion. The bulbous distal tip ends cover a portion of the TSV sidewalls and are over a topmost surface of the outer dielectric sleeve, and have a maximum cross-sectional area that is > 25 % more as compared to a cross-sectional area of the protruding TSV tips below the bulbous distal tip ends.
摘要:
A method of removing oxidation from certain metallic contact surfaces utilizing a combination of relatively simple and inexpensive off-the-shelf equipment and specific chemistry. The method being a very rapid dry process which does not require a vacuum or containment chamber, or toxic gasses/chemicals, and does not damage sensitive electronic circuits or components. Additionally, the process creates a passivation layer on the surface of the metallic contact which inhibits further oxidation while allowing rapid and complete bonding, even many hours after surface treatment, without having to remove the passivation layer. The process utilizes a room-ambient plasma applicator with hydrogen, nitrogen, and inert gasses.