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TSM-DS Family of Dimensionally Stable Low Loss Laminate
Characteristics
Industry best Df (Df: 0.0010/0.0011 [DS/DS3] @10 GHz)
High thermal conductivity (DS3: 0.65 W/m*K)
Low (~5%) fiberglass content
Dimensional stability rivals epoxy
Enables large format high layer count PWBs
Builds complex PWBs in yield with consistency and predictability
Temperature stable DK +/- 0.35% (-30 to 120ºC)
Compatible with resistor foils
Applications
Couplers
Phased Array Antennas
Radar Manifolds
mmWave Antenna/Automotive
Oil Drilling
Semiconductor/ATE Testing
Introducing TSM-DS
The TSM-DS family is comprised of thermally stable, industry leading low loss cores (Df = 0.0010/0.0011 at 10 GHz) that can be manufactured with the predictability and consistency of the best fiberglass reinforced epoxies. The TSM-DS family is ceramic-filled
reinforced materials with very low fiberglass content (~ 5%) that rival epoxies in fabricating large format complex multilayers.
TSM-DS3 was developed for high power applications (TC: 0.65 W/m*K) where it is necessary for the dielectric material to conduct
heat away from other heat sources in a PWB design. TSM-DS3 was also developed to have very low coefficients of thermal expansion for demanding thermal cycling.
The TSM-DS family of cores combined with fastRise™27 (Df: 0.0014 @ 10 GHz) prepreg is an industry leading solution for the lowest
possible dielectric losses that can be attained at epoxy-like 390 - 420 ˚F (200 - 215 ˚C) fabrication temperatures. The low insertion losses of TSM-DS/fastRise™27 are only rivaled by fusion bonding (the melting of pure Teflon® laminates from 550 - 650˚F, 288 - 343˚C). Fusion bonding is expensive, it causes excessive material movement and it puts stress on plated through holes. For complex multilayers, the price of poor yield drives up the final material cost. fastRise™27 enables the sequential lamination of TSM-DS at low 390˚F to 420˚F (200 - 215 ˚C) with consistency and predictability that reduces cost.
For microwave applications, the low x, y and z CTE values ensure that critical spacings between traces in filters and couplers have very low movement with temperature. The TSM-DS family can be used with very low profile copper foils yielding a smooth copper edge between coupled lines.
Registration over many layers is critical for yield and variations in copper weight and copper etching across a panel can cause nonlinear movement. Non-linear movement over large panels leads to a lack of registration of the drilled hole to the pad and possibly open circuits.
TSM-DS is compatible with Ticer and Ohmega resistor foils.
Typical TSM-DS and TSM-DS3 Values
TSM-DS and TSM-DS3 Data Sheet
Download "Strategies for Designing Microwave Multilayer PCBs Using Stripline Structures
Download "TSM-DS Multilayer PCBs Manufactured With Various Prepregs - fastRise 27, HT 1.5, Speedboard C and FEP"
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