摘要:
The object of the present invention is a method of coating a surface of a substrate with copper by electroplating. According to the invention, this method comprises: a step during which the surface to be coated is brought into contact with an electroplating bath while the surface is not under electrical bias; a step of forming the coating during which the surface is biased; a step during which the surface is separated from the electroplating bath while it is under electrical bias; the aforementioned electroplating bath comprising, in solution in a solvent: a source of copper ions, with a concentration of between 0.4 and 40mM; and at least one copper complexing agent.
摘要:
The object of the present invention is a method and compositions for direct copper plating and filling to form interconnects in the fabrication of semiconductor devices.According to the invention, this method comprises: providing an electrolytic copper bath containing, in solution in a solvent, a source of copper ions with a concentration of between 45 and 200 mM, preferably of between 45 and 100 mM and at least one copper complexing agent which is an aliphatic polyamine having 2 to 4 amine functions with a concentration of between 30 and 200 mM, preferably of between 60 and 200 mM; the copper/complexing agent(s) molar ratio being of between 0.2 and 2, preferably between 0.3 and 1.5; bringing said copper diffusion barrier layer of said substrate into contact with said electrolytic copper bath, applying an electrical bias to the substrate for a duration adjusted according to the thickness of copper to be electroplated, removing the substrate from said electrolytic copper bath.
摘要:
A novel complex salt off palladium sulfate and ethylenediamine contains 31 to 41% by weight of palladium and has a molar ratio [SO4]:[Pd] of between 0.9 and 1.15 and a ratio [ethylenediamine ]:[Pd] of between 0.8 and 1.2. The invention further relates to a process for the preparation of this complex salt, and to the use of this complex salt for introducing palladium into an aqueous electrolysis bath of acidic pH for the electrochemical deposition of palladium or one of its alloys, or for adjusting the palladium concentration of such a bath.
摘要:
An aqueous electrolysis bath of acidic pH for the electrochemical deposition of palladium and its alloys, the bath containing a palladium compound and optionally at least one compound of a secondary metal to be co-deposited in the form of an alloy with the palladium. The bath also contains ethylenediamine as a palladium complexing agent, and an organic brightening agent, 3-(3-pyridyl)acrylic acid, 3-(3-quinolyl)acrylic acid or a salt thereof. The invention is also directed to a process for the electroplating of palladium or a palladium alloy utilizing an electrolysis bath as defined above by using current densities of between 0.5 and 150 A/dm2.
摘要:
The present invention essentially relates to a method of preparing an electrically insulating film at the surface of an electrical conductor or semiconductor substrate, such as a silicon substrate.According to the invention, this method comprises: a) bringing said surface into contact with a liquid solution comprising: a protic solvent; at least one diazonium salt; at least one monomer that is chain-polymerizable and soluble in said protic solvent; at least one acid in a sufficient quantity to stabilize said diazonium salt by adjusting the pH of said solution to a value less than 7, preferably less than 2.5; b) the polarization of said surface according to a potentio- or galvano-pulsed mode for a duration sufficient to form a film having a thickness of at least 60 nanometers, and preferably between 80 and 500 nanometers. Application: Metallization of through-vias, especially of 3D integrated circuits.
摘要:
The object of the present invention is an electroplating composition intended in particular for coating a copper-diffusion barrier layer in the fabrication of interconnects for integrated circuits.According to the invention, this composition comprises, in solution in a solvent: a source of copper ions, in a concentration of between 0.4 and 40 mM; at least one copper complexing agent chosen from the group comprising primary aliphatic amines, secondary aliphatic amines, tertiary aliphatic amines, aromatic amines, nitrogen heterocycles and oximes; the copper/complexing agent(s) molar ratio being between 0.1 and 2.5, preferably between 0.3 and 1.3; and the pH of the said composition being less than 7, preferably between 3.5 and 6.5. Application: microelectronics field
摘要:
Process for the treatment of polluted metal-mechanic industrial waste water and urban water, comprising: treating the polluted water with an acid liquor including ferrous chloride and hydrochloric acid, in order to promote the denaturalization of protein present in metal-mechanic industrial water or urban water and generate a clarifying and purifying flocculus from said polluted water.
摘要:
A method for obtaining natural extracts, oleoresins, colorants flavors and aromas from aromatic plant substances, alfalfa, flowers with pigments, and vegetables, which includes washing the plant substances and vegetables, rinsing with water, milling and sifting the resulting product yielding a pulp phase and a cellulose phase. The pulp phase is transferred to fermentation tanks and a first centrifugation of the fermented pulp phase is then performed yielding two phases: phase (A) containing water, mineral salts and other water-soluble substances, with natural extracts, oleoresins, colorants, aromas and flavors and phase (B) in the form of a paste in which the moisture has been reduced to 50%, performing a second centrifugation of the mentioned phase (A), which causes the separation of natural extracts, oleoresins, colorants, aromas and flavors from the water and other water-soluble substances.
摘要:
The subject-matter of the present invention is a composition especially intended for filling, by the electroplating of copper, a cavity in a semiconductor substrate such as a “through-via” structure for the production of interconnects in three-dimensional integrated circuits.According to the invention, this composition comprises in solution in a solvent: copper ions in a concentration lying between 45 and 1500 mM; a complexing agent for the copper consisting of at least one compound chosen from aliphatic polyamines having 2 to 4 amino groups, preferably ethylenediamine, in a concentration lying between 45 and 3000 mM; the molar ratio between the copper and said complexing agent lying between 0.1 and 5; thiodiglycolic acid in a concentration lying between 1 and 500 mg/l; and optionally a buffer system, in particular ammonium sulfate, in a concentration lying between 0.1 and 3M.
摘要:
The invention relates to a method of fixing macro-objects to an electricity conducting- or semi-conducting surface by means of electrografting. The invention also relates to the electricity conducting- or semi-conducting-surfaces obtained using the aforementioned method and to the applications of same.