ACX has the ability to produce a variety of wireless communication
devices such as Diplexer Switch, VCO, PA and highly integrated RF
modules using LTCC technology. We offer extensive expertise using
DuPont and Ferro as well as ACX-developed LTCC tape systems.
LTCC Modules - Multilayer Ceramic Modules Foundry Service
 
LTCC Tape Properties
 
Characteristics
ACX
DuPont 951
Ferro A6M
Dielectric Constant (@ 3GHz)
7.5
7.8
5.9
Dielectric Loss (@ 3GHz)
<0.33%
0.43%
0.20%
TCE (25-300°C) (ppm/°C)
4.7
5.8
7.0
Design Rule
 

ITEM

Standard (mm)

Advanced (mm)

(A) Via diameter

0.125, 0.1801

Flexible  (Min. 0.06)

(B) Min. via cover pad

Via ¯. + 0.03

Via ¯. + 0.02

(C) Min. via diameter / pitch  (Flip chip)

0.125/ 0.260

0.060 / 0.180

(D) Min. spacing from via cover pad to line

0.10

0.08

(E) Min Line width

Nominal

0.10

0.05

Mean value tolerance

±  0.015

±  0.010

(F) Min. line spacing

0.10

0.08

(G) Min. spacing from via cover pad to substrate edge

0.15

0.10

(H) Min. spacing from conductor to substrate edge

0.15

0.10

(I) Min. dimension for extended terminal

0.10

0.08

(M) Min. spacing from ground plane to substrate edge

0.15

0.10

(N) Feed thru spacing

0.15

0.10

Conductor thickness

Nominal

0.013

0.010 (Fine-line printing)

Tolerance

±  0.003

±  0.002

Tape thickness

Without stacked conductors

0.024

0.035

0.046

0.052

Flexible3

(Min/Max: 0.015/0.133)

0.094

0.104

0.129

0.147

With stacked conductors2

0.020

0.030

0.040

0.045

0.080

0.090

0.115

0.133

Tolerance3

Thickness ³0.090

± 7 %

± 5 %

Thickness £0.080

± 5%

± 3 % (Min. ±0.002)

Substrate thickness

Max.

1.6

2.4

Min.

0.5

0.3

Tolerance

±7%(min± 0.075)

±5%(min ± 0.050)

Camber

< 0.3%

< 0.2%

Number of layers

Up to 20

Up to 30

Layer to layer alignment tolerance

± 0.050

± 0.025

Max. panel & array size

Max.

57 x 53

114 x 106

Tolerance

±0.5%Min. ±0.200

±0.2%Min. ±0.100

1All the dimensions are measured after firing.

2Tape thickness is subject to change with stacked conductors at the adjacent areas.

3Based upon the tape thickness with stacked conductors.

Copyrightc2002 ACX Corp. All Rights Reserved