摘要:
A lithographic structure consisting essentially of: an organic antireflective material disposed on a substrate; a vapor-deposited RCHX material, wherein R is one or more elements selected from the group consisting of Si, Ge, B, Sn, Fe and Ti, and wherein X is not present or is one or more elements selected from the group consisting of O, N, S and F; and a photoresist material disposed on the RCHX material. The invention is also directed to methods of making the lithographic structure, and using the structure to pattern a substrate.
摘要:
A lithographic structure comprising: an organic antireflective material disposed on a substrate; and a silicon antireflective material disposed on the organic antireflective material. The silicon antireflective material comprises a crosslinked polymer with a SiOx backbone, a chromophore, and a transparent organic group that is substantially transparent to 193 nm or 157 nm radiation. In combination, the organic antireflective material and the silicon antireflective material provide an antireflective material suitable for deep ultraviolet lithography. The invention is also directed to a process of making the lithographic structure.
摘要:
Methods for generating a nanostructure and for enhancing etch selectivity, and a nanostructure are disclosed. The invention implements a tunable etch-resistant anti-reflective (TERA) material integration scheme which gives high etch selectivity for both etching pattern transfer through the TERA layer (used as an ARC and/or hardmask) with etch selectivity to the patterned photoresist, and etching to pattern transfer through a dielectric layer of nitride. This is accomplished by oxidizing a TERA layer after etching pattern transfer through the TERA layer to form an oxidized TERA layer having chemical properties similar to oxide. The methods provide all of the advantages of the TERA material and allows for high etch selectivity (approximately 5-10:1) for etching to pattern transfer through nitride. In addition, the methodology reduces LER and allows for trimming despite reduced photoresist thickness.
摘要:
A method is provided for preparing a substrate for photolithographic patterning. The method includes providing a substrate having at least an exposed rough surface layer including a polymeric material. The rough surface layer has surface features characterized by feature step height varying between about two percent and twenty percent of the minimum photolithographic half-pitch. A layer of photoresist material is then provided over the exposed rough surface layer and patterned.
摘要:
In order to form a cavity for a fusible link in a semiconductor device, an etchable material is applied over and around a portion of the fusible link and the etchable material is coated with a protection layer. The access abutting the etchable material is formed through the protection layer. After the removal of the etchable material, the access is partially filled with a refilling material to thereby form the cavity.
摘要:
A process for forming raised source/drain junctions using CMP (Chemical Mechanical Polishing) combined with a recess etch of blanket polysilicon. The raised source/drains are defined by gate conductors and by raised STI (Shallow Trench Isolation) which also reduces leakage current through the devices and improves the threshold voltage control. The process uses a salicide gate conductor, and uses conventional polysilicon deposition, CMP, and recess steps to form the raised source/drain junctions, such that it is readily implemented in commercially feasible manufacturing processes.
摘要:
This invention relates to integrated circuit product and processes. More particularly, the invention relates to high performance Dynamic Random Access Memory (DRAM) chips and processes for making such chips. An IC fabrication is provided, according to an aspect of the invention, including a silicon wafer, a DRAM array fabrication disposed on said silicon wafer having a first multitude of gate sidewall oxides, and a logic support device fabrication disposed on said wafer adjacent said DRAM array fabrication and having a second multitude of gate sidewall oxides, said first multitude of gate sidewall oxides being substantially thicker than said second multitude of gate sidewall oxides. Methods of making IC fabrications according to the invention are also provided.
摘要:
The present provides a method for tailoring silicon dioxide source and drain implants and, if desired, extension implants of different devices used on a semiconductor wafer in order to realize shallow junctions and minimize the region of overlap between the gate and source and drain regions and any extension implants. The method includes the steps of applying a mask over a first gate structure positioned on a semiconductor substrate, depositing a layer of a spacer material over the surface of the first gate structure and a second gate structure adjacent to the first gate structure, etching the spacer material so that a portion of the spacer material remains on the second gate sidewalls and a sidewall of the block out mask, implanting ions into the semiconductor substrate into a region defined between the spacer material on the block out mask and the second gate to form a source or drain region, and removing the spacer material and block out mask. If desired, a second etch can be performed on the spacer material to reduce spacer thickness, and second ions can be implanted into the semiconductor substrate into an implant region defined between the spacer material remaining after the second etch.
摘要:
A method includes forming a trench capacitor in a semiconductor body. A recess is formed in the upper portion of the capacitor with such recess having sidewalls in the semiconductor body. A first material is deposited over the sidewalls and over a bottom of the recess. A second material is deposited over the first material. A mask is provided over the second material. The mask has: a masking region to cover one portion of said recess bottom; and a window over a portion of said recess sidewall and another portion of said recess bottom to expose underlying portions of the second material. Portions of the exposed underlying portions of the second material are selectively removing while leaving substantially un-etched exposed underlying portions of the first material. The exposed portions of the first material and underlying portions of the semiconductor body are selectively removed. An isolation region is formed in the removed portions of the semiconductor body. The mask is provided over the second material with a masking region covering one portion of said recess sidewall and one portion of said recess bottom and with a window disposed over an opposite portion of said recess sidewall and an opposite portion of said recess bottom to expose underlying portions of the second material. Etching is provided into the exposed underlying portions of the semiconductor body to form a shallow trench in the semiconductor body. An insulating material is formed in the shallow trench to form a shallow trench isolation region. With such method, greater mask misalignment tolerances are permissible.
摘要:
Disclosed is a method of selectively etching nitride in a chemical downstream etching process. The invention begins by placing a wafer having oxide regions and nitride regions in a chamber. Then, the invention performs a chemical downstream etching process using CH2F2 to etch and convert the nitride regions into surface mediated uniform reactive film (SMURF) regions comprising (NH4)2SiF6. This process then rinses the surface of the wafer with water to remove the surface mediated uniform reactive film regions from the wafer, leaving the oxide regions substantially unaffected. The chemical downstream etching process is considered selective because it etches the nitride regions at a higher rate than the oxide regions.
摘要翻译:公开了一种在化学下游蚀刻工艺中选择性蚀刻氮化物的方法。 本发明首先将具有氧化物区域和氮化物区域的晶片放置在室中。 然后,本发明使用CH 2 N 2 O 2进行化学下游蚀刻工艺,以将氮化物区域蚀刻并转化成表面介导的均匀反应性膜(SMURF)区域,其包含(NH 3) 2 sub> 2 SiF 6。 然后,该方法用水冲洗晶片的表面以从晶片去除表面介导的均匀反应性膜区域,使得氧化物区域基本上不受影响。 化学下游蚀刻工艺被认为是选择性的,因为它以比氧化物区域更高的速率蚀刻氮化物区域。