Module with built-in circuit component and method for producing the same
View Patent ↗A module with a built-in circuit component of the present invention includes an electric insulating layer, a pair of wiring layers provided on both principal planes of the electric insulating layer, a plurality of via conductors electrically connecting the pair of wiring layers and passing through the electric insulating layer in a thickness direction thereof, and a circuit component buried in the electric insulating layer, wherein the plurality of via conductors are disposed in a circumferential portion of the electric insulating layer in accordance with a predetermined rule. The plurality of via conductors are placed at an interval, for example, so as to form at least one straight line, in a cut surface of the electric insulating layer in a direction parallel to a principal plane thereof.
1. A module with a built-in circuit component, comprising:
an electric insulating layer;
a pair of wiring layers provided on both principal planes of the electric insulating layer;
a plurality of via conductors electrically connecting the pair of wiring layers and passing through the electric insulating layer in a thickness direction thereof;
a circuit component buried in the electric insulating layer; and
a pair of wiring boards disposed so as to sandwich the electric insulating layer,
wherein one of the pair of wiring layers provided on both principal planes of the electric insulating layer functions as a wiring layer for one of the wiring boards, and the other wiring layer functions as a wiring layer for the other wiring board,
the plurality of via conductors are disposed at least on a part of a circumference of the electric insulating layer in accordance with a predetermined rule,
a coefficient of linear thermal expansion of the wiring boards in a direction orthogonal to a thickness direction thereof is smaller than that of the electric insulating layer in a direction orthogonal to a thickness direction thereof, and
a Young's modulus of the wiring boards is larger than that of the electric insulating layer.
2. The module with a built-in circuit component according to claim 1 , wherein a flat shape of the electric insulating layer is a rectangle, and the plurality of via conductors are disposed at an interval along three sides among four sides of the rectangle, viewed in a cut surface of the electric insulating layer cut in a direction parallel to the principal plane thereof.
3. The module with a built-in circuit component according to claim 1 , wherein a flat shape of the electric insulating layer is a rectangle, and the plurality of via conductors are disposed at an interval so as to form a rectangle along four sides of the rectangle, viewed in a cut surface of the electric insulating layer cut in a direction parallel to the principal plane thereof.
4. The module with a built-in circuit component according to claim 1 , wherein the plurality of via conductors are arranged in a zigzag manner, viewed in a cut surface of the electric insulating layer cut in a direction parallel to the principal plane thereof.
5. The module with a built-in circuit component according to claim 1 , wherein the wiring board has a multi-layered wiring configuration in which at least one wiring layer is provided in an insulating substrate.
6. The module with a built-in circuit component according to claim 1 , wherein
assuming that a distance from a center on a surface of the electric insulating layer viewed in a cut surface cut in a direction parallel to the principal plane thereof to an edge of the surface is L, the plurality of via conductors are disposed in a region at a distance exceeding 0.7 L from the center.