摘要:
A multilayer wiring substrate having high reliability can be produced in good productivity by subjecting metal wiring layers to stabilization treatment on the surface with a metal such as Cr, Mo or the like or an aqueous solution of water glass so as to prevent generation of hillocks or whiskers and to improve chemical resistance.
摘要:
The present invention provides the wiring structure having a wiring layer and insulation layer and the method of manufacturing the same, wherein at least a part of the wiring of said wiring layer comprises copper, and said insulation layer comprises the polyimide obtained by heating the polyimide precursor composition containing the polyimide precursor having the repeating unit which can be represented by the following general formula (Chemical formula 15). ##STR1## (In this formula, R.sup.1 is at least one type of quadrivalent organic group selected from among the Chemical formulae 16, while R.sup.2 is a bivalent organic group containing aromatic ring).
摘要:
A process for the fabrication of an interconnected multilayer board involves the steps of forming a metallic under-conductive layer on a base substrate, forming a windowed resist layer on the metallic under-conductive layer, filling windows of the resist layer with a conductor by plating thereby forming a conductor layer, forming another windowed resist layer on the conductor layer and filling windows of this resist layer with a conductor by plating, thereby forming a via-hole layer and to provide a two-level structure of the conductor layer and the via-hole layer. Thereafter, the resist layers and portions of the metallic under-conductor layer other than those in contact with a lower face of the conductor constituting the conductor layer are dissolved to form a two-level skeleton structure of conductor lines and spaces within the skeleton structure are filled with a varnish in a solventless form and the varnish is cured.
摘要:
Described herein are interconnected mutilayer boards and their fabrication processes. Multilayer conductor lines of a skeleton structure are formed by conducting multilayer metallization while including all resist layers and metallic under-conductive layers and then removing the resist layers and metallic under-conductive layers at once. Spaces between the multilayer conductor lines of the skeleton structure are then filled with a solventless varnish so that insulating layers are formed. Modules making use of such interconnected multilayer boards and computers having such modules are also described.
摘要:
Disclosed are a highly reliable circuit board and a method of stably manufacturing the circuit board, wherein an insulator made from a specific organic insulating material is provided under a highly stressed conductor for preventing occurrence of cracks in the insulator. In addition, a method of correcting a wiring of a ceramic board is additionally adopted. The circuit board includes a thick film wiring board 1 having a first conductor pattern 2 and a thin film layer laminated on the first conductor pattern 2. The thin film layer includes a first insulator 5 on the first conductor pattern 2; a second insulator 10 on the first insulator 5; a second conductor pattern 8 formed on the first insulator 5 in such a manner as to partially pass through the first insulator 5 and to be electrically connected to the first conductor pattern 2; a wiring pattern 9 for circuit correction formed on the first insulator 5; and a third conductor pattern 11 passing through the first insulator 5 and the second insulator 10 and electrically connected to the second conductor pattern 8.
摘要:
A metalization structure having a first conductor layer on the surface of an underlying layer and, further, a second conductor layer connected conductively with the first conductor layer in which a polyimide insulative film of low thermal expansion coefficient is present between at least an end of a pattern of the second conductor layer and the first conductor layer, for stably obtaining a metalization structure of high reliability and free from the worry of peeling of the conductor portion from a substrate or occurrence of cracking to the underlying layer.
摘要:
A multilayer wiring system for preventing the generation of fixing failure due to an organic residue, eliminating an increase in the number of processes and reducing an area necessary for bonding of the cap and its fabrication method. The multilayer wiring board includes at least one wiring layer made of a conductor, at least one insulating layer made of an organic matter and a board. The wiring layer and the insulating layer are alternately laminated on the board and a cap is provided for covering the insulating layer and the wiring layer. The wiring layer has a wiring pattern for forming a wiring and a frame pattern for surrounding the wiring pattern. This frame pattern includes vent holes. The insulating layer has a shield structure made of an inorganic matter around the outer peripheral portion thereof and/or in the interior thereof. The shield structure is formed of the frame patterns continuously connected to each other and the cap is joined to an uppermost layer of the shield structure.
摘要:
This invention relates to a wiring structure having metal wiring layers and polyimide layers. An object of this invention is to overcome problems caused by oxidation of a metal surface, such as an increase in the resistance of wiring and a reduction in insulation, by preventing a reaction between a metal of the wiring layers, such as copper, and carboxyl groups of polyamic acid which make up the polyimide layers. In the wiring structure according to the present invention, the polyimide layers have been formed by heating and curing a resin composition which comprises a polyimide precursor, an amine compound and an organic solvent.
摘要:
Heat-resistant bonding materials are composed of a polyimide precursor end-capped at molecule ends thereof and/or an imide compound formed from the polyimide precursor. They may also contain fine particles of at least one material selected from metals, metal oxides, metal carbides and metal nitrides.
摘要:
A thin film magnetic head of which the insulation layer is made of a polyimide resin obtained by heat-curing a polyimide precursor represented by the following general formula (I) or (II) or a mixture thereof not only has excellent characteristics with respect to the insulation layer, i.e. satisfactory flatness, high glass transition temperature and excellent adhesiveness but also is free from film defects, i.e., exhibits high reliability: ##STR1## wherein R is, e.g., ##STR2## Ar.sup.1 is, e.g., ##STR3## Ar.sup.2 is, e.g. ##STR4## n is an integer of 1 to 100, and m is an integer of 10 to 500.