Source: https://patents.justia.com/patent/7662233
Timestamp: 2020-04-10 06:46:52
Document Index: 342513851

Matched Legal Cases: ['art 300', 'art 320', 'art 340', 'art 320', 'art 300', 'art 340']

US Patent for ALD apparatus and method Patent (Patent # 7,662,233 issued February 16, 2010) - Justia Patents Search
Justia Patents By Means To Heat Or CoolUS Patent for ALD apparatus and method Patent (Patent # 7,662,233)
FIGS. 2 present a schematic comparison between prior art flow versus time chart 300 presented in FIG. 2a and the inlet flow into an SMFD showerhead 104, chart 320 presented in FIG. 2b. Since typical SMFD timing is more than 5 times shorter, the time scale of the SMFD charts is divided by a factor of 5. FIG. 2c presents chart 340 which represents the complementary flow versus time into the DGIC 630 in synchronization with the inlet flow depicted in chart 320 (FIG. 2b ). An ALD cycle comprised of first chemical dose 302, first purge 304, second chemical dose 306, and second purge 308 is conventionally carried under substantially constant flow conditions as illustrated in chart 300. In contrast, the inlet sequence 320 of first chemical dose 322, first purge 324, second chemical dose 326, and second purge 328 is carried under substantially modulated flow conditions. Complementary draw flow presented in chart 340 maintains the pressure during chemical dose steps with draw flow 342 and 344 during chemical dose steps 322 and 326, respectively. Note the transient stages 321 and 325 at the leading edge of chemical dose 322 and 326, respectively. These booster high-flow leading edge transients are further taught in U.S. patent application Ser. No. 10/347575, now U.S. Pat. No. 6,911,092 issued Jun. 28, 2005, which is commonly assigned to Sundew Technologies, Inc., and PCT Application No. US03/101548, now PCT Publication No. WO 03/062490 published Jul. 31, 2003, which is commonly assigned to Sundew Technologies, Inc.
5. The chemical source vapor pressure control system as in claim 4 and characterized in that said chemical source is selected from the group consisting of Hf, Zr, Ru, RuO2, Si, W, Mo, Co, Cu, Al, Os, OsO2, Fe, Ta and combinations thereof; and said etching gas is selected from the group consisting of Cl2, Cl2/N2, Cl2/O2/O3, N2/HF, N2/CIF3, CO, CO/N2 and combinations thereof.
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Patent number: 7662233
Patent Publication Number: 20070269983
Current U.S. Class: By Means To Heat Or Cool (118/724); Chamber Seal (118/733); With Means For Measuring, Testing, Or Sensing (117/201); Measuring, Testing, Or Indicating (427/8); Thickness Or Uniformity Of Thickness Determined (427/9); Coating By Vapor, Gas, Or Smoke (427/248.1)