Patent ID: 9113557
Filing Date: 2015-08-18
Classification: H05K

Abstract:
1. A junction box, comprising a multi-layer circuit board, wherein the circuit board comprises: a plurality of dielectric layers, each having conducting track on a side and arranged one on top of another to form the multi-layered circuit board with a plurality of inner dielectric layers and first and second outer dielectric layers along an exterior of the circuit board, wherein the conducting tracks of the respective first and second outer dielectric layers are positioned on a side of the respective first and second outer dielectric layers facing toward an interior of the circuit board and toward the plurality of inner dielectric layers; power circuitry directly mounted on the circuit board; signal processing circuitry directly mounted on the circuit board; and a power input for inputting electrical power into the circuitry on the circuit board, wherein the electrical power is transferred through a conducting track arranged to be on an inner dielectric layer, the conducting track on the inner dielectric layer being thicker than the conducting track arranged on the outer dielectric layers; the power circuitry is arranged on a power circuitry region of the circuit board and the signal processing circuitry is arranged on a signal processing circuitry region of the circuit board; a thermal dam including the plurality of dielectric layers, the thermal dam being positioned between the power circuitry region of the circuit board and the signal processing circuitry of the circuit board to thermally isolate the power circuitry region from the signal processing circuitry of the circuit board, electro-magnetic compatibility (EMC) performance of the circuit board is maintained by the presence of a conducting material between the two regions on the circuit board such that the thermal dam contains less than 10% of the conducting material than the power circuitry region of the circuit board; and wherein the signal processing circuitry region has a copper coverage and the power circuitry region has a higher copper coverage than the copper coverage on the signal processing circuitry region.