Abstract:
SU-8 photoresist compositions are modified to improve their adhesion properties by adding 1% to 6% of an adhesion promoter selected from the group consisting of glycidoxypropanetrimethoxysilane, mercatopropyltrimethoxysilane, and aminopropyltrimethoxysilane. SU-8 photoresist compositions are modified to improve their resistance to cracking and film stress by adding 0.5% to 3% of a plasticizer selected from the group consisting of dialkylphthalates, dialkylmalonates, dialkylsebacates, dialkyladipates, and diglycidyl hexahydrophthalates. The improvements can be obtained simultaneously by adding both the adhesion promoter and the plasticizer to SU-8 photoresist compositions.
Abstract:
SU-8 photoresist compositions are modified to improve their adhesion properties by adding 1% to 6% of an adhesion promoter selected from the group consisting of glycidoxypropanetrimethoxysilane, mercaptopropyltrimethoxysilane, and aminopropyltrimethoxysilane. SU-8 photoresist compositions are modified to improve their resistance to cracking and film stress by adding 0.5% to 3% of a plasticizer selected from the group consisting of dialkylphthalates, dialkylmalonates, dialkylsebacates, dialkyladipates, and diglycidyl hexahydrophthalates. The improvements can be obtained simultaneously by adding both the adhesion promoter and the plasticizer to SU-8 photoresist compositions.
Abstract:
A conductive paste (16) for use in making conductive bumps (18) and a method for using the conductive paste to make conductive bumps (18) on a substrate (10). The conductive paste (16) is formed by combining a tin alloy with a flux composition containing an aromatic carboxylic acid fluxing agent and a solvent. The conductive paste (16) is disposed on underbump metallization layers (15) and reflowed to form the conductive bumps (18).
Abstract:
A semiconductor component (10) having a photodefinable stress compensation layer (21) and composition for the stress compensation material. The photodefinable stress compensation material is formed on a semiconductor wafer (11) and openings (22) are made photolithographically. Conductive bumps (26) are then disposed thereon and additional conductive bumps (28) are formed on the original conductive bumps (26). The photodefinable stress compensation material is composed of a photoinitiator, an epoxy having a first index of refraction, a diluent, and a filler. The indices of refraction of the epoxy-diluent combination and the filler are approximately equal. Alternatively, the photodefinable stress compensation material can be formed on a semiconductor wafer (11) having conductive bumps (46) disposed thereon. Openings (49) are formed in the stress compensation layer (47) to expose the conductive bumps (46). Additional conductive bumps (51) are formed on the original conductive bumps (46).
Abstract:
A process for using removable Z-axis anisotropically conductive adhesive material (21) which includes water, a matrix resin (23), and conductive spheres (22). The material (21) is suitable for providing temporary contact between electronic devices. In one embodiment, the material (21) is used to temporarily bond a semiconductor wafer (11) to a probe substrate (12) for wafer-level burn-in.
Abstract:
A triazine-based mixture, used as a multichip module device dielectric (14), is made more robust and more resistant to temperature extremes by making it to be of from twenty to sixty percent by weight of triazine and of one to ten percent by weight of siloxane-caprolactone copolymer. The foregoing mixture can be made to have a higher resolution by including zero to twenty percent by weight of novolak epoxy acrylate. The entire mixture preferably additionally comprises two to eight percent by weight of bisphenol-A diglycidyl ether monoepoxyacrylate, zero to twenty percent by weight of carboxyl-terminated butadiene nitrile rubber, two to six percent of N-vinylpyrrolidone, one to ten percent of trimethylolpropanetriacrylate, zero to five weight percent glycidoxypropyltrimethoxysilane, 0.05 to five weight percent photoinitiator, zero to two percent pigment, 0.1 to one percent surfactant, zero to 0.3 percent copper benzoylacetonate, and thirty to fifty percent solvent.
Abstract:
An optical waveguide (11) is composed substantially entirely of triazine. Various methods for making desired triazine waveguide patterns are described.
Abstract:
Silicon carbide (SiC) etchants with a generic formula of MXO2, where M is an alkali metal, X is a halogen, O is oxygen are disclosed. When mixed with an abrasive powder in an aqueous slurry form, this MXO2 etchant acts as tribochemical reactant in enhancing the SiC material removal rate during chemical mechanical polishing (CMP). The material removal rates can sometimes go up to a few order of magnitudes, as compared to the slurry without this MXO2 etchant. Typical metal in the formula MXO2 are K (potassium) and Na (sodium), X includes Cl (chlorine), Br (bromine) and I (iodine). The whole series of MXO2 compounds belong to the chemical family of metal halites or ammonium halites. Sodium chlorite, NaClO2, the simplest and most available member of the halite family, is a typical example. The enhanced polishing rate can be utilized to significantly increase the throughput of CMP operation for non-oxide wafer polishing. The polishing waste water from the CMP process can be treated with ease in the waste water treatment facilities because of the absence of toxic heavy metal ions in the polishing formulations.
Abstract:
Contacts of an electrical device can be made of carbon nanotube columns. Contact tips can be disposed at ends of the columns. The contact tips can be made of an electrically conductive paste applied to the ends of the columns and cured (e.g., hardened). The paste can be applied, cured, and/or otherwise treated to make the contact tips in desired shapes. The carbon nanotube columns can be encapsulated in an elastic material that can impart the dominant mechanical characteristics, such as spring characteristics, to the contacts. The contacts can be electrically conductive and can be utilized to make pressure-based electrical connections with electrical terminals or other contact structures of another device.
Abstract:
Carbon nanotube columns each comprising carbon nanotubes can be utilized as electrically conductive contact probes. The columns can be grown, and parameters of a process for growing the columns can be varied while the columns grow to vary mechanical characteristics of the columns along the growth length of the columns. Metal can then be deposited inside and/or on the outside of the columns, which can enhance the electrical conductivity of the columns. The metalized columns can be coupled to terminals of a wiring substrate. Contact tips can be formed at or attached to ends of the columns. The wiring substrate can be combined with other electronic components to form an electrical apparatus in which the carbon nanotube columns can function as contact probes.