Patent ID: 11894322
Assignee: ANALOG DEVICES, INC.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 17:
18. An electronic device comprising:
a system board having a first radio frequency (RF) communications line, the first RF communications line having a first impedance at one or more operational frequencies;
a laminate substrate mounted to the system board, the laminate substrate having a front side and a back side opposite the front side;
a plurality of solder balls disposed between the system board and the back side of the laminate substrate, the solder balls electrically connecting the system board and the laminate substrate; and
a ball launch structure defined at least in part by one or more layers at or near the back side of the laminate substrate, the ball launch structure comprising metallic and insulating materials arranged in a first pattern having a second impedance at the one or more operational frequencies, the second impedance of the ball launch structure matched to the first impedance of the first RF communications line such that a voltage standing wave ratio (VSWR) of the ball launch structure is less than 5:1,
wherein the first pattern of the ball launch structure comprises a metallic trace extending generally parallel to a major lateral dimension of the laminate substrate for transferring signals laterally and comprising at least two turns and a variable with portion along at least a portion of a length of the first pattern of the ball launch structure, the variable width portion of the metallic trace disposed in a same plane as the at least two turns, wherein the variable width portion is positioned between the at least two turns and a conductive via, and wherein the variable width portion is positioned adjacent to a location at which the metallic trace connects to the conductive via.