摘要:
The present invention relates to a ceramic coating composition comprising a preceramic material such as silicon oxide precursors, silicon carbonitride precursors, silicon carbide precursors and silicon nitride precursors and a flux material such as B 2 O 3 , PBO 2 , P 2 O 5 and Bi 2 O 3 . The present invention also relates to a substrate such as an electronic device having said coating applied and ceramified thereon.
摘要:
A method and composition for joining flip chips back-side-up with respect to substrates, comprises applying an adhesive between the active side of the flip chip and the substrate. The adhesive is a conductive silicone pressure sensitive adhesive containing (i) a silicone resin, (ii) a siloxane gum, (iii) a conductive particulate material and, optionally, (iv) a peroxide catalyst. Suitable conductive particulate materials are silver-clad glass fibers; spherical gold particles; spherical hollow glass microspheres coated with silver, gold, nickel or copper; or spherical particles of metal alloys of Sn/Cu, Pb/Sn or Au/Sn. The adhesive is applied as a ball or bump itself, in conjunction with a solder ball or bump or in the form of tape sandwiched between the flip chip and the substrate.
摘要:
Disclosed are coating compositions which include a preceramic silicon-containing material dissolved in short chain linear siloxanes. These compositions surprisingly have a long shelf life and are useful for forming coatings which are thick and of good quality.
摘要:
The present invention relates to a method of forming coatings on electronic substrates and to the substrates coated thereby. The method comprises applying a coating comprising a borosilazane and a filler on a substrate and then heating the coated substrate at a temperature sufficient to convert the borosilazane to a ceramic coating.
摘要:
This invention relates to integrated circuits which are protected from the environment. Such circuits are hermetically sealed by applying a non-corroding, conductive layer to the bond pads and additional ceramic layers to the primary passivation.
摘要:
The present invention relates to a method of forming patterned coatings on substrates, especially electronic devices, by negative resist techniques. The method comprises applying a preceramic coating comprising hydrogen silsesquioxane resin and an initiator onto the substrate and then radiating a selected region of the coating for a time sufficient to cure the resin. The uncured coating is then rinsed away leaving the patterned coating.