Multi-layer ceramic capacitor and production method thereof

Abstract

The present invention relates to a multi-layer ceramic capacitor printed simultaneously with internal electrode and external electrode by employing an inkjet printing. A method for manufacturing the multi-layer ceramic capacitor comprising first external electrode, dielectric, internal electrode and second external electrode prints simultaneously the first external electrode; the internal electrode which is connected with the first external electrode and formed at an invaginated portion of the dielectric invaginated to allow one side to be opened at one portion; and the second external electrode which is formed integrally with the internal electrode by employing an inkjet printing. According to the present invention, a method for manufacturing the multi-layer ceramic capacitor resolves contact problems by printing integrally the internal electrode and the external electrode and reduces the manufacturing process.

1 . A device for manufacturing a multi-layer ceramic capacitor comprising an inkjet print head for the electrode spraying ink for the electrode, and an inkjet print ink for the dielectric spraying ink for the dielectric, wherein said inkjet print head for the electrode and said inkjet print head for the dielectric print simultaneously each internal electrode, external electrode, and dielectric. 
     
     
         2 . The device for manufacturing a multi-layer ceramic capacitor of  claim 1 , wherein said inkjet print head for the electrode simultaneously prints the first external electrode, the internal electrode connected to the first external electrode and formed at an invaginated portion of the dielectric invaginated to allow one side to be opened at one portion, and the second external electrode integrally formed with the internal electrode by an inkjet printing. 
     
     
         3 . The device for manufacturing a multi-layer ceramic capacitor of  claim 1 , wherein side inkjet print head for the electrode and said inkjet print head for the dielectric spray inks by moving integrally. 
     
     
         4 . The device for manufacturing a multi-layer ceramic capacitor of  claim 1 , wherein said inkjet print head for the electrode and said inkjet print head for the dielectric spray ink by moving independently according to its own operation signal. 
     
     
         5 . A method for manufacturing a multi-layer ceramic capacitor comprising:
 forming lower dielectric sheets simultaneously printed with internal electrode, external electrode, and dielectric by spraying ink for the electrode and ink for the dielectric according to a predetermined pattern employing a plurality of inkjet print heads;   forming upper dielectric sheets with a predetermined number simultaneously printed with internal electrode, external electrode, and dielectric by spraying ink for the electrode and ink for the dielectric according to a predetermined pattern employing a plurality of inkjet print heads on the lower dielectric sheets; and   sintering the lower dielectric sheets and the upper dielectric sheets with a predetermined number.   
     
     
         6 . The method for manufacturing a multi-layer ceramic capacitor of  claim 5 , the method further comprising cutting said lower dielectric sheets and said upper dielectric sheets according to a predetermined pattern. 
     
     
         7 . The method for manufacturing a multi-layer ceramic capacitor of  claim 5 , wherein said plurality of inkjet print heads comprise an inkjet print head for the electrode spraying ink for the electrode and an inkjet print head for the dielectric spraying ink for the dielectric. 
     
     
         8 . The method for manufacturing a multi-layer ceramic capacitor of  claim 7 , wherein said inkjet print head for the electrode and said inkjet print head for the dielectric spray inks by moving integrally. 
     
     
         9 . The method for manufacturing a multi-layer ceramic capacitor of  claim 7 , wherein said inkjet print head for the electrode and said inkjet print head for the dielectric spray inks by moving independently according to its own operation signals. 
     
     
         10 . A multi-layer ceramic capacitor comprising a first external electrode, dielectric invaginated to allow one side to be opened at a portion and connected to the first external electrode, internal electrode formed at the invaginated portion of the dielectric, and a plurality of dielectric sheets printed with a second external electrode formed integrally with the internal electrode,
 wherein the dielectric sheets are layered symmetrically with alternating the first external electrode and the second external electrode to connect electrically each other.   
     
     
         11 . The multi-layer ceramic capacitor of  claim 10 , wherein said multi-layer ceramic capacitor is printed simultaneously with the first external electrode, the dielectric, the internal electrode, and the second external electrode by an inkjet printing 
     
     
         12 . The multi-layer ceramic capacitor of  claim 11 , wherein said inkjet printing is a method to spray ink for the electrode and ink for the dielectric according to predetermined patterns by employing a plurality of inkjet print heads. 
     
     
         13 . The multi-layer ceramic capacitor of  claim 10 , wherein said first external electrode, said dielectric, said internal electrode, and said second external electrode are formed with different materials from each other.