| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_f80389bda5f7f6a9ee3ffaca30aee739 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10S310-80
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10T29-42 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B06B1-0688
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H10N30-098 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H02N2-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B06B1-06
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H01L41-45 |
| filingDate |
2001-09-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
2003-01-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8521894f5a539cb3d40257aab5fc57d9
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d8947e8d97a4ebd3c61227f5a258d111
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_67a4e8a274d7281463c575459c89802d |
| publicationDate |
2003-01-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-6504289-B2 |
| titleOfInvention |
Piezeoelectric transducer having protuberances for transmitting acoustic energy and method of making the same |
| abstract |
A method of forming an ultrasound transducer having thermoformed protuberances comprises providing a substrate having a plurality of perforations of a given dimension. The perforations or apertures are formed in the substrate and operate to determine the resonance frequency associated with the transducer. A film of polymeric material capable of showing piezoelectric properties when strained in its plane and electrically biassed by a field applied in a direction normal to its faces, is then laminated onto the substrate. The film is heated to a given temperature and a pressure differential is applied between the top and bottom surfaces of the film for a sufficient time to form protuberances in the film through the apertures in the substrate. The film is then cooled to a given ambient temperature while maintaining a pressure differential between the top and bottom surfaces of the film for a sufficient time until the ambient temperature is reached so as to cause the protuberances to maintain a substantially permanent curvature. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9731141-B2
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| priorityDate |
2000-03-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |