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An electrical connector (1) comprises a dielectric housing consisting of a first housing (10, 52) and a second housing (40, 51), a spacer (20) assembled at a bottom of the housing and a plurality of circuit boards (30). The housing defines a plurality of parallel channels (15) extending in a mating

An electrical connector (1) comprises a dielectric housing consisting of a first housing (10, 52) and a second housing (40, 51), a spacer (20) assembled at a bottom of the housing and a plurality of circuit boards (30). The housing defines a plurality of parallel channels (15) extending in a mating direction of the electrical connector. A plurality of bumps (106) extends downward from an upper wall of the housing in alignment with the channels for abutting against with an upper face of a corresponding circuit board. The spacer consists of a plurality of identical wafers (21) thereby each two adjacent wafers defining a slot (200) to receive a corresponding circuit board therein. Each wafer has a dielectric base (22), a plurality of terminals (23) attached on a first side of the dielectric base to electrically connect with a corresponding circuit board, and a grounding bus (24) mainly attached on an opposite second side of the dielectric base.

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1. An electrical connector comprising: a dielectric housing comprising a first housing and a second housing assembled to the first housing, the first housing forming a plurality of ribs defining parallel channels therebetween, the channels extending in a mating direction of the electrical connect

1. An electrical connector comprising: a dielectric housing comprising a first housing and a second housing assembled to the first housing, the first housing forming a plurality of ribs defining parallel channels therebetween, the channels extending in a mating direction of the electrical connector, a plurality of bumps extending downward from an upper wall of the dielectric housing in a vertical alignment with each channel; a spacer assembled in the housing and including a plurality of wafers, each wafer having a dielectric base, a plurality of terminals attached on a side of the dielectric base and a grounding bus mainly attached on the other side of the dielectric base; and a plurality of circuit boards mounted between two adjacent wafers and an upper face of each circuit board abutting against a corresponding bump, said each circuit board electrically connecting with the terminals and the grounding bus; wherein the bump in each channel is inclined 45 degrees relative to the mating direction of the electrical connector; wherein the grounding bus has a contacting leg extending to the side of the dielectric base on which the terminals are attached. 2. An electrical connector comprising: a dielectric housing forming a channel along a mating direction of the connector, said dielectric housing further forming a bump in the channel; a plurality of wafers received in the housing and every two wafers defining a slot therebetween, each wafer having a dielectric base, a terminal and a grounding bus disposed on the dielectric base, said grounding bus defining a supporting pad facing the bump of the housing in a first direction; and a circuit board received in the channel of the dielectric housing and the slot to electrically connecting with the terminal and the grounding bus on a corresponding wafer, the circuit board being held in position in a second direction by the terminal and grounding bus of the corresponding wafer and the other wafer, said second direction being perpendicular to the first direction, and being held in the position in the first direction between the bump and the supporting pad of the grounding bus of the corresponding wafer; wherein the bump extends downwardly from a bottom face of an upper surface wall of the dielectric housing; wherein a contacting leg extends from the grounding bus of the corresponding wafer and engages with one side of the circuit board, and the other side of the circuit board engages with the grounding bus of the other wafer; further having a fastening element covering a back of the housing to enclose the circuit board therein.