Method of manufacturing multilayered printed-wiring-board

Claim 1

A method of manufacturing a multilayered print-wiring-board, comprising the steps of: attaching a conductive member on a partial surface of a conductive layer formed on at least one of opposite surfaces of a printed-wiring-board in a pattern; before aid attaching step, applying over the surface of said conductive layer a buffer layer for buffering a thermal stress resulting from a difference in coefficient of thermal expansion between said conductive layer and said conductive member; superimposing a plurality of printed-wiring-boards one over another in such a manner that said conductive member formed and attached on said conductive layer on one of said printed-wiring board confronts either said conductive layer or said conductive member on another of said plurality of said printed-wiring-boards, at least one of said plurality of printed-wiring-boards having been processed by said attaching step; and after said superimposing step, electrically connecting said conductive member to either said conductive layer of said conductive member of another of said plurality of said printed-wiring-boards which confronts said conductive member to form an electrical conductive layer.

Claim 2

A method of manufacturing a multilayered print-wiring-board, comprising the steps of: attaching a conductive member on a partial surface of a conductive layer formed on at least one of opposite surfaces of a printed-wiring-board in a pattern; before aid attaching step, applying over the surface of said conductive layer a buffer layer for buffering a thermal stress resulting from a difference in coefficient of thermal expansion between said conductive layer and said conductive member; superimposing a plurality of printed-wiring-boards one over another in such a manner that said conductive member formed and attached on said conductive layer on one of said printed-wiring board confronts either said conductive layer or said conductive member on another of said plurality of said printed-wiring-boards, at least one of said plurality of printed-wiring-boards having been processed by said attaching step; and after said superimposing step, electrically connecting said conductive member to either said conductive layer of said conductive member of another of said plurality of said printed-wiring-boards which confronts said conductive member to form an electrical conductive layer.

Claim 3

A method of manufacturing a multilayered printed-wiring-board, comprising the steps of: attaching a conductive member on a partial surface of a conductive layer formed on at least one of opposite surfaces of a printed-wiring board in a pattern; printing an electrically insulating member on a partial surface of said conductive layer of at least a conductive-member-free portion thereof, said electrically insulating member including an insulating adhesive resin having a predetermined temperature of curing; superimposing a plurality of printed-wiring-boards one over another in such a manner that said conductive member attached on said conductive layer on one of said printed-wiring-boards confronts either said conductive layer or said conductive member on another of said plurality of printed-wiring-boards, at least one of said plurality of printed-wiring-boards having been processed by the first-named attaching step and the printing step; and after said superimposing step, electrically connecting said conductive member to either said conductive layer or said conductive member of said another of said plurality of printed-wiring-boards which confronts said conductive member to form an electrically connecting layer.

Claim 4

A method of manufacturing a multilayered printed-wiring-board, comprising the steps of: attaching a conductive member on a partial surface of a conductive layer formed on at least one of opposite surfaces of a printed-wiring board in a pattern; printing an electrically insulating member on a partial surface of said conductive layer of at least a conductive-member-free portion thereof, said electrically insulating member including an insulating adhesive resin having a predetermined temperature of curing; superimposing a plurality of printed-wiring-boards one over another in such a manner that said conductive member attached on said conductive layer on one of said printed-wiring-boards confronts either said conductive layer or said conductive member on another of said plurality of printed-wiring-boards, at least one of said plurality of printed-wiring-boards having been processed by the first-named attaching step and the printing step; and after said superimposing step, electrically connecting said conductive member to either said conductive layer or said conductive member of said another of said plurality of printed-wiring-boards which confronts said conductive member to form an electrically connecting layer.

Claim 5

A method of manufacturing a multilayered printed-wiring boards, comprising the steps of: attaching a conductive member on a partial surface layer formed on at least one of opposite surfaces of a printed-wiring-board in a pattern; attaching an electrically insulating member on a partial surface of said conductive member at least a conductive-member-free portion thereof and to a partial surface of said conductive layer so as to cover said conductive member, said electrically insulating member having a curing temperature lower than a melting point of said conductive member; superposing a plurality of printed-wiring-boards one over another in such a manner that said conductive member attached on said conductive layer on one of said printed-wiring-boards confronts either said conductive layer or said conductive member on another of said plurality of said printed-wiring-boards, at least one of said plurality of printed-wiring-boards having been processed by the first-named attaching step and the second-named attaching step; and after said superimposing step, electrically connecting said conductive member to either said conductive layer or said conductive member of said another of said plurality of said printed-wiring-boards which confronts said conductive member to form an electrically connecting layer.

Claim 6

A method of manufacturing a multilayered printed-wiring boards, comprising the steps of: attaching a conductive member on a partial surface layer formed on at least one of opposite surfaces of a printed-wiring-board in a pattern; attaching an electrically insulating member on a partial surface of said conductive member at least a conductive-member-free portion thereof and to a partial surface of said conductive layer so as to cover said conductive member, said electrically insulating member having a curing temperature lower than a melting point of said conductive member; superposing a plurality of printed-wiring-boards one over another in such a manner that said conductive member attached on said conductive layer on one of said printed-wiring-boards confronts either said conductive layer or said conductive member on another of said plurality of said printed-wiring-boards, at least one of said plurality of printed-wiring-boards having been processed by the first-named attaching step and the second-named attaching step; and after said superimposing step, electrically connecting said conductive member to either said conductive layer or said conductive member of said another of said plurality of said printed-wiring-boards which confronts said conductive member to form an electrically connecting layer.

Claim 7

A method of manufacturing a multilayered printed-wiring-board, comprising the steps of: (a) attaching a conductive member on a partial surface of a conductive layer formed on at least one of opposite surfaces of a printed-wiring-board in a pattern, said conductive member including a plurality of spacer pieces each having a substantially constant thickness; (b) superimposing a plurality of printed-wiring-boards one over another in such a manner that said conductive member formed and attached on said conductive layer on one of said plurality of said printed-wiring-boards confronts either said conductive layer or said conductive member on another printed-wiring boards, at least one of said plurality of printed-wiring-boards having been processed by said attaching step; and (c) after said superimposing step, electrically connecting said conductive member to either said conductive layer or said conductive member of said another of said plurality of said printed-wiring-boards which confronts said conductive member to form an electrical connecting layer.

Claim 8

A method of manufacturing a multilayered printed-wiring-board, comprising the steps of: (a) attaching a conductive member on a partial surface of a conductive layer formed on at least one of opposite surfaces of a printed-wiring-board in a pattern, said conductive member including a plurality of spacer pieces each having a substantially constant thickness; (b) superimposing a plurality of printed-wiring-boards one over another in such a manner that said conductive member formed and attached on said conductive layer on one of said plurality of said printed-wiring-boards confronts either said conductive layer or said conductive member on another printed-wiring boards, at least one of said plurality of printed-wiring-boards having been processed by said attaching step; and (c) after said superimposing step, electrically connecting said conductive member to either said conductive layer or said conductive member of said another of said plurality of said printed-wiring-boards which confronts said conductive member to form an electrical connecting layer.