Source: http://www.google.com/patents/US7993808?ie=ISO-8859-1
Timestamp: 2016-02-14 08:49:49
Document Index: 179620357

Matched Legal Cases: ['Application No. 10', 'Application No. 2006101524283', 'Application No. 0608609', 'Application No. 178317', 'Application No. 2006', 'Application No. 2006', 'Application No. 2007146915', 'Application No. 2007', 'Application No. 096114844', 'Application No. 200910150015', 'Application No. 095123517', 'Application No. 095128606']

Patent US7993808 - TARC material for immersion watermark reduction - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsA coating material disposed overlying a photo sensitive layer during an immersion lithography process includes a polymer that is substantially insoluble to an immersion fluid and an acid capable of neutralizing a base quencher from the photo sensitive layer....http://www.google.com/patents/US7993808?utm_source=gb-gplus-sharePatent US7993808 - TARC material for immersion watermark reductionAdvanced Patent SearchPublication numberUS7993808 B2Publication typeGrantApplication numberUS 11/324,588Publication dateAug 9, 2011Filing dateJan 3, 2006Priority dateSep 30, 2005Fee statusPaidAlso published asCN1940721A, CN1940721B, CN1940722A, CN1940722B, DE102006046453A1, US8202680, US8597870, US20070077517, US20110262871, US20120258400Publication number11324588, 324588, US 7993808 B2, US 7993808B2, US-B2-7993808, US7993808 B2, US7993808B2InventorsChing-Yu ChangOriginal AssigneeTaiwan Semiconductor Manufacturing Company, Ltd.Export CitationBiBTeX, EndNote, RefManPatent Citations (49), Non-Patent Citations (12), Classifications (15), Legal Events (2) External Links: USPTO, USPTO Assignment, EspacenetTARC material for immersion watermark reduction
US 7993808 B2Abstract
1. A coating material disposed over a photosensitive layer and for use during an immersion lithography process, the coating material comprising:
an acid that substantially neutralizes a base quencher diffusing into the coating material from the photosensitive layer; and
10. The coating material of claim 9, wherein the solvent comprises cyclohexanol.
11. A coating material disposed over a photosensitive layer and for use during an immersion lithography process, the coating material comprising:
a chelate compound that bonds a quencher diffusing into the coating material from the photosensitive layer;
FIG. 2 illustrates a schematic view of an example of a reaction between a quencher and a chelate compound. A quencher 202 having a tertiary amine may react with a chelate compound 204 having a halogenalkane and forms a quaternary ammonium salt 206.
Referring again to FIG. 1, the coating layer may be integral to a top anti-reflective coating layer (TARC) with an enhanced reflection to a radiation energy during an exposing process. The coating material layer 130 may be alternatively formed above or below a separate TARC layer. The coating material layer 130 may include a multiple layer structure (composite layer). For example, the coating material layer 130 may include a dual layer structure having a first coating layer and a second coating layer disposed on the first coating layer. The first and second coating layers may include different materials tuned for intended functions. The first coating layer may be disposed on top of the resist layer 120 and may be designed to function as a quencher catch layer to neutralize the quencher diffused from the resist layer 120. To avoid resist intermixing during the coating, the solvent of the first coating layer may be different from that of the resist layer. For example, if the resist layer is a PGME/PGMEA solvent, the first coating layer may utilize an alcohol solvent. The second coating layer may be a polymer network cross-linked at a baking process, or may utilize a normal solvent such as PGME/PGMEA solvent to eliminate intermixing. Alternatively, the first coating layer may be cross-linked and the second coating layer may utilize a normal solvent such as a PGME/PGMEA solvent. The second coating layer may be designed to isolate the resist layer from the immersion fluid, eliminating fluid uptake from the immersion fluid such as de-ionized water (DIW). Collectively or alternatively, the second coating layer may be designed to prevent resist composition leaching from the resist layer 120. The function of the first and second coating layers may be switched to make the fist layer as an isolation and second layer as a quencher neutralizer.
The method 300 then proceeds to a step 308 to bake (post exposure bake or PEB) the resist layer. The baking temperature may range between about 80� C. and 150� C. The baking may have a duration ranging from about 1 to 20 minutes in one example. The baking step may further serve to remove water drops.
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G02B1/111, G03F7/2041, G03F7/091, G03F7/11European ClassificationG03F7/09A, G02B1/11B, G03F7/20F, G03F7/11Legal EventsDateCodeEventDescriptionJan 3, 2006ASAssignmentOwner name: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY, LTD.,Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:CHANG, CHING-YU;REEL/FRAME:017443/0328Effective date: 20051020Jan 21, 2015FPAYFee paymentYear of fee payment: 4RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services