Abstract: A vehicle floor portion structure that includes: a pair of rockers extending in a vehicle front-and-rear direction; a tunnel extending in the vehicle front-and-rear direction, and the tunnel including a first upper wall portion, and a pair of first side wall portions; cross-members that link the rockers with the tunnel in the vehicle width direction; a tunnel upper reinforcement provided above the tunnel, the tunnel upper reinforcement partially overlapping with the cross-members in side view and being joined together with the cross-members; and a tunnel lower reinforcement disposed in the tunnel, a closed cross section portion being formed between the tunnel lower reinforcement and the first upper wall portion and the pair of first side wall portions, and the tunnel lower reinforcement overlapping with the cross-members in side view and being joined together with the cross-members.

Abstract: A vehicle lower section structure including: rockers; a floor tunnel; and a floor cross member that extends along the vehicle width direction and couples the rocker and the floor tunnel together, that includes an upper wall, a front wall extending downward from a front end portion of the upper wall, and a rear wall extending downward from a rear end portion of the upper wall that together with the floor panel configure a closed cross-section, wherein of the front wall and the rear wall, a first cutout portion is formed in a lower edge of an end portion at the rocker side of the wall further from a center pillar, and a second cutout portion that is smaller than the first cutout portion is formed in a lower edge of an end portion at the rocker side of the wall closer to the center pillar.

Abstract: A vehicle skeleton structure including: a tunnel portion that projects upward in a vertical direction at a vehicle width direction central portion of a floor panel, and that extends in a vehicle front-rear direction, the tunnel portion including side wall portions opposing each other in the vehicle width direction, and an upper wall portion that interconnects upper end portions of the side wall portions; a tunnel upper reinforcement member that covers the upper wall portion and the side wall portions of the tunnel portion from an exterior of each and that is joined to the tunnel portion; and a cross member that bridges, along the vehicle width direction, the tunnel portion and a rocker that is disposed at a vehicle width direction outer side of the floor panel, and that extends in the vehicle front-rear direction, the cross member being directly or indirectly joined to the tunnel upper reinforcement member.

Abstract: There is provided a vehicle floor portion structure having: a floor panel; a tunnel portion that projects-out toward a vehicle upper side at a vehicle transverse direction central portion of the floor panel; a cross member that is bridged, along a vehicle transverse direction, between the tunnel portion and a rocker that is at a vehicle transverse direction outer side of the floor panel; a bracket that is disposed so as to be apart from the cross member in a vehicle longitudinal direction, and whose bottom portion is fixed to the floor panel, and whose side portion is fixed to a side wall portion of the tunnel portion or the rocker, and a seat is fixed to the bracket; and a reinforcement that is provided at an upper portion of the tunnel portion or the rocker, and to which an upper portion of the bracket is joined.

Abstract: A vehicle lower section structure including: rockers; a floor tunnel; and a floor cross member that extends along the vehicle width direction and couples the rocker and the floor tunnel together, that includes an upper wall, a front wall extending downward from a front end portion of the upper wall, and a rear wall extending downward from a rear end portion of the upper wall that together with the floor panel configure a closed cross-section, wherein of the front wall and the rear wall, a first cutout portion is formed in a lower edge of an end portion at the rocker side of the wall further from a center pillar, and a second cutout portion that is smaller than the first cutout portion is formed in a lower edge of an end portion at the rocker side of the wall closer to the center pillar.

Abstract: A vehicle floor portion structure that includes: a pair of rockers extending in a vehicle front-and-rear direction; a tunnel extending in the vehicle front-and-rear direction, and the tunnel including a first upper wall portion, and a pair of first side wall portions; cross-members that link the rockers with the tunnel in the vehicle width direction; a tunnel upper reinforcement provided above the tunnel, the tunnel upper reinforcement partially overlapping with the cross-members in side view and being joined together with the cross-members; and a tunnel lower reinforcement disposed in the tunnel, a closed cross section portion being formed between the tunnel lower reinforcement and the first upper wall portion and the pair of first side wall portions, and the tunnel lower reinforcement overlapping with the cross-members in side view and being joined together with the cross-members.

Abstract: There is provided a vehicle floor portion structure having: a floor panel; a tunnel portion that projects-out toward a vehicle upper side at a vehicle transverse direction central portion of the floor panel; a cross member that is bridged, along a vehicle transverse direction, between the tunnel portion and a rocker that is at a vehicle transverse direction outer side of the floor panel; a bracket that is disposed so as to be apart from the cross member in a vehicle longitudinal direction, and whose bottom portion is fixed to the floor panel, and whose side portion is fixed to a side wall portion of the tunnel portion or the rocker, and a seat is fixed to the bracket; and a reinforcement that is provided at an upper portion of the tunnel portion or the rocker, and to which an upper portion of the bracket is joined.

Abstract: A vehicle skeleton structure including: a tunnel portion that projects upward in a vertical direction at a vehicle width direction central portion of a floor panel, and that extends in a vehicle front-rear direction, the tunnel portion including side wall portions opposing each other in the vehicle width direction, and an upper wall portion that interconnects upper end portions of the side wall portions; a tunnel upper reinforcement member that covers the upper wall portion and the side wall portions of the tunnel portion from an exterior of each and that is joined to the tunnel portion; and a cross member that bridges, along the vehicle width direction, the tunnel portion and a rocker that is disposed at a vehicle width direction outer side of the floor panel, and that extends in the vehicle front-rear direction, the cross member being directly or indirectly joined to the tunnel upper reinforcement member.

Abstract: A method for fabricating a hybrid IC substrate comprises the steps of baking a conductor of a first group on an insulating ceramic substrate, forming an insulating porous active layer including a glass component and a small amount of a metal component having a catalytic action for electroless plating, forming a resist pattern on the active layer by using a photomask, and forming a conductor of a second group by electroless plating on a portion of the active layer not covered with the resist, whereby a portion of the active layer sandwiched between the conductors of the first and second groups is rendered conductive and a portion of the active layer in direct contact with the insulating substrate is maintained as an insulator.