| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_6a162b65402a9a79580e3ae31dcbf3fa |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B82Y40-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B82Y20-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B82Y10-00 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G03F1-48
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G03F1-54
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G03F1-52
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H01L21-0332
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G03F1-24
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G03F1-22 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G03F1-54
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G03F1-24
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H01L21-033 |
| filingDate |
2018-06-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_171dfd7c432a9b4b82f36e6e7ff2a19f
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_120185cea4c27759ffe9e77f4f913ad1 |
| publicationDate |
2020-05-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-2020159106-A1 |
| titleOfInvention |
Reflective photomask blank and reflective photomask |
| abstract |
A reflective photomask blank (10) of a first aspect includes a substrate (1); a reflective layer (2) formed on the substrate (1); and a light absorbing layer (4) formed on the reflective layer (2). The light absorbing layer (4) includes a tin oxide film with an atomic ratio (O/Sn) of oxygen (O) to tin (Sn) being more than 1.50 and equal to or less than 2.0, and with a film thickness of 25 nm or more and 45 nm or less. Consequently, the shadowing effect of a reflective photomask for pattern transfer using extreme ultraviolet light as a light source is suppressed or reduced to improve the performance of transfer to a semiconductor substrate, and further, the cleaning resistance of the light absorbing layer is improved. |
| priorityDate |
2017-07-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |