Patents by Inventor Abdallah Tangi

Abdallah Tangi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Self-catalytic bath and method for the deposition of a nickel-phosphorus alloy on a substrate
    Patent number: 6281157
    Abstract: Disclosed are a self-catalytic bath and a method for the deposition of Ni—P alloy on a substrate. The bath comprises nickel sulfate, sodium hypophosphite as a reducing agent, acetic acid as a buffer and traces of lead as a stabilizer. It also includes a citrate used as a complexing agent associated with a gluconate used both as a catalyst and a stabilizer. The disclosed bath makes it possible to tolerate large quantities of hypophosphite and is relatively long-lived. Furthermore, it can be used to prepare large quantities of Ni—P alloy per liter of solution.
    Type: Grant
    Filed: July 24, 2000
    Date of Patent: August 28, 2001
    Assignee: STMicroelectronics S.A.
    Inventors: Abdallah Tangi, Mohamed Elhark, Ali Ben Bachir, Abdellah Srhiri, Mohamed Cherkaoui, Mohamed Ebntouhami, El Mustapha Saaoudi
  • Self-catalytic bath and method for the deposition of a nickel-phosphorus alloy on a substrate
    Patent number: 6143059
    Abstract: Disclosed are a self-catalytic bath and a method for the deposition of Ni-P alloy on a substrate. The bath comprises nickel sulfate, sodium hypophosphite as a reducing agent, acetic acid as a buffer and traces of lead as a stabilizer. It also includes a citrate used as a complexing agent associated with a gluconate used both as a catalyst and a stabilizer. The disclosed bath makes it possible to tolerate large quantities of hypophosphite and is relatively long-lived. Furthermore, it can be used to prepare large quantities of Ni-P alloy per liter of solution.
    Type: Grant
    Filed: September 21, 1998
    Date of Patent: November 7, 2000
    Assignee: SGS-Thomson Microelectronics S.A.
    Inventors: Abdallah Tangi, Mohamed Elhark, Ali Ben Bachir, Abdallah Shriri, Mohamed Cherkaoui, Mohamed Ebntouhami, Mustapha Saaoudi El