http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-114426698-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_4a50b4c9d3ea196fec12d8b31e1343d4 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J2379-08 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J9-28 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G73-1071 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G73-1028 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08L79-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G73-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08J9-28 |
| filingDate | 2022-03-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_7d96797506bf54451b9b637ac538aa2a http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_3eaf676c8f93a41da8d8ef0e58e84657 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_53ebb241cdde8fe5bacf607280758dbc |
| publicationDate | 2022-05-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-114426698-A |
| titleOfInvention | A kind of ultra-low dielectric porous polyimide film and preparation method thereof |
| abstract | A preparation method of an ultra-low dielectric porous polyimide film. The porous polyimide film adopts aromatic dianhydride and diamine as polymerized monomers, and ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate ([BMIM][BF 4 ]) as porogen A thin film of 20-40 μm was prepared by in-situ polymerization and blending, and the dielectric constant of the thin film was 1.50-2.84. The molar ratio of the total amount of amino groups involved in the polymerization process to the total amount of acid anhydride groups is 1:1, and the volume fraction of [BMIM][BF 4 ] in the entire system is 0-85 vol%. The porous polyimide film has ultra-low dielectric constant, good thermal stability, excellent hydrophobicity and wave-absorbing properties, and has broad application prospects in the fields of flexible circuit boards, microelectronic packaging, national defense, and aerospace. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-115322431-A |
| priorityDate | 2022-03-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 44.