DC Field | Value | Language |
---|---|---|
dc.contributor.author | Cho, SD | ko |
dc.contributor.author | Jang, KW | ko |
dc.contributor.author | Hyun, JG | ko |
dc.contributor.author | Lee, S | ko |
dc.contributor.author | Paik, Kyung-Wook | ko |
dc.contributor.author | Kim, HS | ko |
dc.contributor.author | Kim, Joungho | ko |
dc.date.accessioned | 2007-09-03T07:14:02Z | - |
dc.date.available | 2007-09-03T07:14:02Z | - |
dc.date.created | 2012-02-06 | - |
dc.date.issued | 2005-10 | - |
dc.identifier.citation | IEEE TRANCSACTIONS ON ELECTRONICS PACKAGING MANUFACTURING, v.28, no.4, pp.297 - 303 | - |
dc.identifier.issn | 1521-334X | - |
dc.identifier.uri | http://hdl.handle.net/10203/1244 | - |
dc.description.abstract | Epoxy/BaTiO3 composite embedded capacitor films (ECFs) were newly designed for high dielectric constant and low-tolerance (less than ±5%) embedded capacitor fabrication for organic substrates. In terms of material formulation, ECFs are composed of a specially formulated epoxy resin and latent curing agent, and in terms ofa coating process, a comma roll coating method is used for uniform film thickness in large area. The dielectric constant of ECF in high frequency range (0.5∼3 GHz) is measured using the cavity resonance method. In order to estimate dielectric constant, the reflection coefficient is measured with a network analyzer. The dielectric constant is calculated by observing the frequencies of the resonant cavity modes. Calculated dielectric constants in this frequency range are about 3/4 of the dielectric constants at 1 MHz. This difference is due to the decrease of the dielectric constant of the epoxy matrix. The dielectric relaxation of barium titanate (BaTiO3: BT) powder is not observed within measured frequency. An alternative material for embedded capacitor fabrication is epoxy/BaTiO3 composite embedded capacitor paste (ECP). It uses similar materials formulation like ECF and a screen printing method for film coating. The screen printing method has the advantage of forming a capacitor partially in the desired part. However, the screen printing makes surface irregularities during mask peel-off. Surface flatness is significanfly improved by adding some additives and by applying pressure during curing. As a result, a dielectric layer with improved thickness uniformity is successfully demonstrated. Using epoxy/BaTiO3 composite ECP, a dielectric constant of 63 and specific capacitance of 5.1 nF/cm2 were achieved. ? 2005 IEEE. | - |
dc.description.sponsorship | This work was supported by the Center for Electronic Packaging Materials of the Korean Science and Engineering Foundation. | en |
dc.language | English | - |
dc.language.iso | en_US | en |
dc.publisher | Institute of Electrical and Electronics Engineers | - |
dc.title | Epoxy/BaTiO3 composite films and pastes for high dielectric constant and low-tolerance embedded capacitors fabrication in organic substrates | - |
dc.type | Article | - |
dc.identifier.scopusid | 2-s2.0-27844507065 | - |
dc.type.rims | ART | - |
dc.citation.volume | 28 | - |
dc.citation.issue | 4 | - |
dc.citation.beginningpage | 297 | - |
dc.citation.endingpage | 303 | - |
dc.citation.publicationname | IEEE TRANCSACTIONS ON ELECTRONICS PACKAGING MANUFACTURING | - |
dc.embargo.liftdate | 9999-12-31 | - |
dc.embargo.terms | 9999-12-31 | - |
dc.contributor.localauthor | Paik, Kyung-Wook | - |
dc.contributor.localauthor | Kim, Joungho | - |
dc.contributor.nonIdAuthor | Cho, SD | - |
dc.contributor.nonIdAuthor | Jang, KW | - |
dc.contributor.nonIdAuthor | Hyun, JG | - |
dc.contributor.nonIdAuthor | Lee, S | - |
dc.contributor.nonIdAuthor | Kim, HS | - |
dc.subject.keywordAuthor | Dielectric constant | - |
dc.subject.keywordAuthor | Embedded capacitor | - |
dc.subject.keywordAuthor | Polymer-ceramic composite | - |
dc.subject.keywordAuthor | Tolerance | - |
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