Motorola Corporation

Mona A Chopra

Brian David Young

James F Wenzel

Everitt W Mace

Stephen W Foster

An electronic component (15) such as a printed circuit board (PCB) is formed using a sintering process. A layer of dielectric powder (11) is partially converted to a solid layer of dielectric material (14) by exposing selective portions of the powder (11) to a laser (17). A layer of conductive powder (20) is then formed over the solid layer of dielectric material (14) and selectively sintered to form a solid layer of conductive material (19). This process can be used to form an interconnect structure (45), a coaxial structure (60), a cavity (89), a trench structure (90), or a slug (91), conductive traces (19), bond pads (31), or any other circuit board structure.

Method of forming electronic component

A high frequency bypass capacitor (36, 36') is built into a thin-film portion (16, 16') of a polymer carrier substrate (15) of a PBGA (10). The carrier substrate (15) has both a stiffener (18) and a thin-film portion (16, 16') which has multiple metal layers (24, 28, 30, 32). The power supply planes (28, 30) of these metal layers are used to form built-in bypass capacitors (36, 36'), wherein the power supply planes are specifically designed to be adjacent and parallel layers. An ultra thin film laminate construction provides thin dielectric films (26) between the metal layers to allow the bypass capacitor to be placed very dose to the attached semiconductor die (12) to further reduce parasitic inductance and resistance between die connections (14) and the bypass capacitor. The built-in feature minimizes inherent parasitic series inductance and resistance, thus enabling the filtering of unwanted low pulse width glitches on a power plane connected to VLSI devices at operating frequencies at or above 100 MHz.

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Austin, TX, United States of America

Mona A Chopra