摘要:
A printed wiring board including a core substrate, a build-up layer formed over the core substrate and including a first insulating layer, a conductor layer formed over the first insulating layer, and a second insulating layer formed over the conductor layer, and one or more wiring patterns formed over the first insulating layer. The conductor layer includes conductor portions, and the conductor portions have notched portions, respectively, facing each other across the wiring pattern.
摘要:
A printed wiring board including a core substrate, a build-up layer formed over the core substrate and including a first insulating layer, a conductor layer formed over the first insulating layer, and a second insulating layer formed over the conductor layer, and one or more wiring patterns formed over the first insulating layer. The conductor layer includes conductor portions, and the conductor portions have notched portions, respectively, facing each other across the wiring pattern.
摘要:
A printed wiring board including a core substrate, a build-up layer formed over the core substrate and including a first insulating layer, a conductor layer formed over the first insulating layer, and a second insulating layer formed over the conductor layer, and one or more wiring patterns formed over the first insulating layer. The conductor layer includes conductor portions, and the conductor portions have notched portions, respectively, facing each other across the wiring pattern.
摘要:
A printed wiring board including a core substrate, a build-up layer formed over the core substrate and including a first insulating layer, a conductor layer formed over the first insulating layer, and a second insulating layer formed over the conductor layer, and one or more wiring patterns formed over the first insulating layer. The conductor layer includes conductor portions, and the conductor portions have notched portions, respectively, facing each other across the wiring pattern.
摘要:
A filet F is added to a portion constituting a corner portion C equal to or smaller than 90° in a crossing portion X of wiring patterns 58b, 58c and 58d, and a wiring pattern 58 is formed. Since the filet F is added, the wiring patterns are not made thin and are not disconnected in the crossing portion X. Further, since there is no stress concentrated to the crossing portion X, disconnection is not caused in the wiring patterns and no air bubbles are left between the crossing portion X of the wiring patterns and an interlayer resin insulating layer so that reliability of a printed wiring board is improved.
摘要:
A filet F is added to a portion constituting a corner portion C equal to or smaller than 90° in a crossing portion X of wiring patterns 58b, 58c and 58d, and a wiring pattern 58 is formed. Since the filet F is added, the wiring patterns are not made thin and are not disconnected in the crossing portion X. Further, since there is no stress concentrated to the crossing portion X, disconnection is not caused in the wiring patterns and no air bubbles are left between the crossing portion X of the wiring patterns and an interlayer resin insulating layer so that reliability of a printed wiring board is improved.
摘要:
A filet F is added to a portion constituting a corner portion C equal to or smaller than 90° in a crossing portion X of wiring patterns 58b, 58c and 58d, and a wiring pattern 58 is formed. Since the filet F is added, the wiring patterns are not made thin and are not disconnected in the crossing portion X. Further, since there is no stress concentrated to the crossing portion X, disconnection is not caused in the wiring patterns and no air bubbles are left between the crossing portion X of the wiring patterns and an interlayer resin insulating layer so that reliability of a printed wiring board is improved.
摘要:
A filet F is added to a portion constituting a corner portion C equal to or smaller than 90° in a crossing portion X of wiring patterns 58b, 58c and 58d, and a wiring pattern 58 is formed. Since the filet F is added, the wiring patterns are not made thin and are not disconnected in the crossing portion X. Further, since there is no stress concentrated to the crossing portion X, disconnection is not caused in the wiring patterns and no air bubbles are left between the crossing portion X of the wiring patterns and an interlayer resin insulating layer so that reliability of a printed wiring board is improved.
摘要:
A multi-layer printed wiring board includes a board covered with a conductor layer, an interlayer insulating resin layer, an etched metal film on the interlayer insulating resin layer, and a via hole. The interlayer insulating resin layer has a fibrous substrate. The via hole has an electrolytic plated film and an electrolessly plated film and connects the conductor layer of the board and the etched metal film.
摘要:
A multi-layer printed wiring board includes a board covered with a conductor layer, an interlayer insulating resin layer, an etched metal film on the interlayer insulating resin layer, and a via hole. The interlayer insulating resin layer has a fibrous substrate. The via hole has an electrolytic plated film and an electrolessly plated film and connects the conductor layer of the board and the etched metal film.