摘要:
In the formation of an interconnect structure, a metal feature is formed in a dielectric layer. An etch stop layer (ESL) is formed over the metal feature and the dielectric layer using a precursor and a carbon-source gas including carbon as precursors. The carbon-source gas is free from carbon dioxide (CO2). The precursor is selected from the group consisting essentially of 1-methylsilane (1MS), 2-methylsilane (2MS), 3-methylsilane (3MS), 4-methylsilane (4MS), and combinations thereof.
摘要:
In the formation of an interconnect structure, a metal feature is formed in a dielectric layer. An etch stop layer (ESL) is formed over the metal feature and the dielectric layer using a precursor and a carbon-source gas including carbon as precursors. The carbon-source gas is free from carbon dioxide (CO2). The precursor is selected from the group consisting essentially of 1-methylsilane (1MS), 2-methylsilane (2MS), 3-methylsilane (3MS), 4-methylsilane (4MS), and combinations thereof.
摘要:
A method of lithography patterning includes forming a mask layer on a material layer and forming a capping layer on the mask layer. The capping layer is a boron-containing layer with a higher resistance to an etching reaction of patterning process of the material layer. By adapting the boron-containing layer as the capping layer, the thickness of the mask layer can be thus reduced. Hence, a better gap filling for forming an interconnect metallization in the material layer could be achieved as well.
摘要:
Methods for improving post etch in via or trench formation in semiconductor devices. A preferred embodiment comprises forming a re-capping layer over a dielectric film following an initial etch to form a feature in the dielectric film, followed by additional etch and etch back processing steps. The re-capping method provides protection for underlying films and prevents film damage post etch. Uniform feature profiles are maintained and critical dimension uniformity is obtained by use of the methods of the invention. The time dependent dielectric breakdown performance is increased.
摘要:
A method for forming an integrated circuit includes forming a low-k dielectric layer over a semiconductor substrate, etching the low-k dielectric layer to form an opening, forming a dielectric barrier layer covering at least sidewalls of the opening, performing a treatment to improve a wetting ability of the dielectric barrier layer, and filling the opening with a conductive material, wherein the conductive material is in contact with the dielectric barrier layer.
摘要:
A method for forming an integrated circuit includes forming a low-k dielectric layer over a semiconductor substrate, etching the low-k dielectric layer to form an opening, forming a dielectric barrier layer covering at least sidewalls of the opening, performing a treatment to improve a wetting ability of the dielectric barrier layer, and filling the opening with a conductive material, wherein the conductive material is in contact with the dielectric barrier layer.
摘要:
A method for forming an integrated circuit structure includes providing a semiconductor substrate; forming a low-k dielectric layer over the semiconductor substrate; generating hydrogen radicals using a remote plasma method; performing a first hydrogen radical treatment to the low-k dielectric layer using the hydrogen radicals; forming an opening in the low-k dielectric layer; filling the opening with a conductive material; and performing a planarization to remove excess conductive material on the low-k dielectric layer.
摘要:
A semiconductor device is disclosed. The device includes a substrate, a first porous SiCOH dielectric layer, a second porous SiCOH dielectric layer, and an oxide layer. The first porous SiCOH dielectric layer overlies the substrate. The second porous SiCOH dielectric layer overlies the first porous SiCOH dielectric layer. The oxide layer overlies the second porous SiCOH dielectric layer. The atomic percentage of carbon in the second porous SiCOH dielectric layer is between 16% and 22% of that in the first porous SiCOH dielectric layer.
摘要:
A bilayer porous low dielectric constant (low-k) interconnect structure and methods of fabricating the same are presented. A preferred embodiment having an effective dielectric constant of about 2.2 comprises a bottom deposited dielectric layer and a top deposited dielectric layer in direct contact with the former. The bottom layer and the top layer have same atomic compositions, but a higher dielectric constant value k. The bottom dielectric layer serves as an etch stop layer for the top dielectric layer, and the top dielectric layer can act as CMP stop layer. One embodiment of making the structure includes forming a bottom dielectric layer having a first porogen content and a top dielectric layer having a higher porogen content. A curing process leaves lower pore density in the bottom dielectric layer than that left in the top dielectric layer, which leads to higher dielectric value k in the bottom dielectric layer.
摘要:
A method of and apparatus for forming interconnects on a substrate includes etching patterns in ultra-low k dielectric and removing moisture from the ultra-low k dielectric using active energy assist baking. During active energy assist baking, the ultra-low k dielectric is heated and exposed to light having only wavelengths greater than 400 nm for about 1 to about 20 minutes at a temperature of about 300 to about 400 degrees Celsius. The active energy assist baking is performed after wet-cleaning or after chemical mechanical polishing, or both.