Process for manufacturing a multilayer substrate
AssigneeFujitsu Limited
InventorsKanji Nagashima, Yuji Yamada, Toshihiro Kusagaya
Life of this patent
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Abstract
Green sheets can be laminated without destroying the cross-sectional shape of a metallization pattern printed on a green sheet by burying the pattern in the green sheet while freezing the pattern and heating the green sheet until the green sheet containing the pattern has a flat top surface. Accordingly, the pattern is buried in the green sheet and the shape of the pattern is preserved. When laminated and pressed, the pattern is not damaged since it has been buried in the green sheet.
Claims16
A process for laminating a green sheet on a metallized green sheet, said process comprising the steps of:
- (a) preparing a first green sheet;
- (b) printing a metallization pattern on the first green sheet;
- (c) burying the metallization pattern in the first green sheet while freezing the metallization pattern so that a top surface of the first green sheet is made flat and a cross-sectional shape of the metallization pattern is substantially preserved after burying;
- and
- (d) superposing a second green sheet on the first green sheet on a side in which the metallization pattern is buried.
A process for manufacturing a multilayer substrate, comprising the steps of:
- (a) preparing a plurality of metallized green sheets, including the steps of:
- (i) preparing a green sheet ;
- (ii) printing a metallization pattern on the green sheet;
- and
- (iii) burying the metallization pattern in the green sheet while freezing the metallization pattern so that a top surface of the first green sheet is made flat and a cross-sectional shape of the metallization pattern is substantially preserved after burying;
- (b) laminating the plurality of metallized green sheets;
- and
- (c) heat treating the laminate of the metallized green sheets to obtain a multilayer substrate.
Dependencies are inferred from the claim text.