Abstract: A circuit board assembly is provided. The circuit board assembly includes a circuit board and a plurality of chips assembled on a surface of the circuit board. The plurality of chips include integrated circuit (IC) chips. At least two chips are positioned on the surface of the circuit board adjacent to one another with a spacing separating the two chips that is less than a minimum dimension of each of the two chips. A method for circuit board assembly is also provided.

Abstract: A system or method ensures proper insertion of a circuit board (“card”) assembly into a card support assembly. A card assembly includes a first keying feature other than on a faceplate connected to the card assembly. The keying feature may be a notch, tab or slot, and the keying feature may be integral with the card assembly. The card support assembly includes a second keying feature that corresponds to the first keying feature. The second keying feature is positioned so as to allow cards with the correct keying feature to connect with the support assembly and to prevent cards that lack the keying feature, or are misaligned, from contacting the connectors of the support assembly. As a result, an effective keying solution is provided for the card assembly, and damage to circuit boards and connectors caused by improper connections is prevented without costly manufacturing processes.

Abstract: A system of circuit board chassis can be configured to accept different types of circuit boards or modules. In one embodiment, a first chassis is adapted to receive a first type of circuit board, and a second chassis is adapted to fit inside the first chassis in place of at least one of the circuit boards. In this embodiment, the second chassis is also adapted to receive circuit boards of a second type, enabling them to operate inside the first chassis. As a result, a system that may have been previously adapted to receive only one type of circuit board may be configured to operate with multiple types of circuit boards.