Dielectric constant εr and broadband dielectric loss tan δ measurements were performed for the thermoplastic toughened cyanate ester printed circuit board CYTUF material. Characterization of tan δ over the 1-8 GHz frequency range was made using a simple short-pulse propagation technique. All the measurements were taken on four-metal-layer, 23×36 cm cards with representative transmission line structures. It was found the εr=3.48-3.64 and tan δ=0.0095-0.01, which are much lower than for standard FR-4 material. The impact of improved characteristics on wireability is analyzed through simulations of representative printed circuit board interconnections
Published in:
Components, Packaging, and Manufacturing Technology, Part B: Advanced Packaging, IEEE Transactions on
(Volume:19
,
Issue:
2
)
Date of Publication: May 1996