公开(公告)号：US09980381B2

公开(公告)日：2018-05-22

申请号：US14571369

申请日：2014-12-16

Applicant: MOTOROLA SOLUTIONS, INC

Inventor： Seng Huan Chuah ,  Friedrich Josef Bollmann ,  Khai Jin Choo ,  Weng Kong Hor ,  Sih Hau Tan

IPC: H05K1/11 ,  H05K1/14 ,  H04M1/02 ,  H05K5/06 ,  H05K1/02

CPC classification number: H05K1/144 ,  H04M1/0277 ,  H05K1/0215 ,  H05K1/0224 ,  H05K1/14 ,  H05K5/064 ,  H05K2201/041 ,  H05K2201/042 ,  H05K2201/043 ,  H05K2201/045 ,  H05K2201/10371 ,  H05K2201/10409 ,  H05K2201/2018

Abstract: A method and circuit board arrangement for an intrinsically safe portable device includes two or more circuit boards having a frame structure that forms a contiguous boundary around a space between the circuit boards. In the space there are circuit components mounted on both circuit boards, and a connector that connect the two circuit boards. An encapsulant material fills the space bounded by the frame structure between the circuit boards to exclude airborne material from coming into contact with the encapsulated circuit components.