| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_b55c349b43c3ecba4977fd52cc8f8c67 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J2379-08
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02P20-54
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J2201-0464 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J9-28
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G73-10
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H05K1-0346 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H05K1-03
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G73-10
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08J9-26
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08J9-28 |
| filingDate |
2001-11-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
2007-08-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d7801423940cabae20bd01d28b9d371c
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8759944600c45d234a39b62d4ff3a6e8
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e9430173234e223697c182e7b1037b3a
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8b3918f99d03e500a974b0e7ee3a1987 |
| publicationDate |
2007-08-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
TW-I285654-B |
| titleOfInvention |
Process for producing porous polyimide |
| abstract |
A porous polyimide having a finely cellular structure and having a low dielectric constant and heat resistance. The porous polyimide can be produced by a process comprising adding a dispersible compound to a polyimide precursor to form a micro-domain structure in which the dispersible compound is dispersed in the polymer so as to have a size smaller than 10 mum and then removing the dispersible compound by extraction with supercritical carbon dioxide to thereby make the precursor porous, wherein the interaction parameter chiAB between the polyimide precursor A and the dispersible compound B is larger than 3. This porous polyimide has an average cell diameter smaller than 5 mum and a dielectric constant of 3 or lower. |
| priorityDate |
2000-11-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |