Abstract:
The present invention relates to a method of enhancing the strength of a semiconductor wafer or semiconductor chip, the semiconductor wafers being sliced from an ingot or cut from a foil and preprocessed in one or several preprocessing steps prior to further processing steps for generating semiconductor elements. In the proposed method at least one annealing step is performed in addition to the one or several preprocessing steps and processing steps. With the proposed method the fracture strength of semiconductor wafers can be significantly enhanced thus allowing the use of semiconductor wafers with a higher degree of damages and increasing the yield of the whole wafer processing.
Abstract:
A method is disclosed which includes: forming at least one layer of material on at least part of a surface of a first substrate, wherein a first surface of the at least one layer of material is in contact with the first substrate thereby defining an interface; attaching a second substrate to a second surface of the at least one layer of material; forming bubbles at the interface; and applying mechanical force; whereby the second substrate and the at least one layer of material are jointly separated from the first substrate. Related arrangements are also described.
Abstract:
A method for temporary bonding first and second wafers includes, applying a first adhesive layer upon a first surface of a first wafer and then curing the first adhesive layer. Next, applying a second adhesive layer upon a first surface of a second wafer. Next, inserting the first wafer into a bonder module and holding the first wafer by an upper chuck assembly so that its first surface with the cured first adhesive layer faces down. Next, inserting the second wafer into the bonder module and placing the second wafer upon a lower chuck assembly so that the second adhesive layer faces up and is opposite to the first adhesive layer. Next, moving the lower chuck assembly upwards and bringing the second adhesive layer in contact with the cured first adhesive layer, and then curing the second adhesive layer.
Abstract:
A method of simultaneously cleaning inorganic and organic contaminants from semiconductor wafers and micro-etching the semiconductor wafers. After the semiconductor wafers are cut or sliced from ingots, they are contaminated with cutting fluid as well as metal and metal oxides from the saws used in the cutting process. Aqueous alkaline cleaning and micro-etching solutions containing alkaline compounds and mid-range alkoxylates are used to simultaneously clean and micro-etch the semiconductor wafers.
Abstract:
A method is disclosed which includes: forming at least one layer of material on at least part of a surface of a first substrate, wherein a first surface of the at least one layer of material is in contact with the first substrate thereby defining an interface; attaching a second substrate to a second surface of the at least one layer of material; forming bubbles at the interface; and applying mechanical force; whereby the second substrate and the at least one layer of material are jointly separated from the first substrate. Related arrangements are also described.
Abstract:
A sandblasting agent which can prevent fouling by metal ions; and a method of sandblasting a silicon wafer with the agent. The method comprises using a sandblasting agent containing a chelating agent. The chelating agent is selected, for example, among the following (1) to (4) and salts of these. (1) Nitrilotriacetic acid (NTA); (2) Ethylenediaminetetraacetic acid (EDTA); (3) Diethylenediamine-N,N,N'',N''-pentaacetic acid (DTPA); (4) Cyclohexanediaminetetraacetic acid (CyDTA).