i c s .c o m
ATC Q-BRIDGE THERMAL CONDUCTOR
ATC Q-Bridge
Thermal Conductor
ATC’s new Q-Bridge Thermal Conductor is manufactured
with the highest quality materials for reliable and
repeatable performance providing a cost effective
thermal management solution. These devices are
constructed with Aluminum Nitride (AlN) or Beryllium
Oxide (BeO) and are available in standard EIA form factors.
Q-Bridge provides the designer with the ability to manage
thermal conditions by directing heat to a thermal ground
plane, heat sink or any other specific thermal point
of interest. The inherently low capacitance makes
this device virtually transparent at RF / microwave
frequencies. This device has the added benefit of offering
additional layers of protection to adjacent components
from hot spot thermal loads.
Q-Bridge provides the benefit of increased overall circuit
reliability. ATC’s Q-Bridge is manufactured using onepiece construction, providing a RoHS compliant SMT
package that is fully compatible with high speed automated pick-and-place processing. It is available in various
EIA case sizes. Custom configurations are also available.
Applications:
• GaN Power Amplifiers
• High RF Power Amplifiers
• Filters
• Synthesizers
• Industrial Computers
• Switch Mode Power Supplies
• Pin & Laser Diodes
Features:
• High Thermal Conductivity
Functional Applications:
• Low Thermal Resistance
• Between active device and adjacent ground planes
• Low Capacitance
• Specific contact pad to case
• Increases Circuit Reliability
• Contact pad to contact pad
• RoHS Compliant
• Direct component contact to via pad or trace
• More efficient thermal management
• Edges fully metalized
Termination Materials
ATC Termination Code
Termination Materials
Y
Silver Platinum Non-Magnetic Termination
S
Silver over Magnetic Termination
Note: Non-edge wrapped style in all case sizes is supplied with S termination
Edge wrapped style in case sizes 0302 through 1111 is supplied with Y termination
Edge wrapped style in case sizes 2010 through 3737 are supplied with S termination
ATC # 001-1143
Rev. I, 4/20
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ATC Q-BRIDGE THERMAL CONDUCTOR
t
t
Mechanical Configurations
L
W
W
L
T
T
Wrapped
Non-Wrapped
Typical Characteristics
Thermal
Thermal
Resistance (°C/W) Conductivity (mW/°C)
Case
Size
Length (L)
Width (W)
Thickness
(T)
Terminal
(t)
0302
.030 ±.002
(.77 ±.051)
.020 ±.002
(0.51 ±.051)
20
(0.51 ±.05)
10
(0.25)
19
12
53
81
0402
.040 ±.002
(1.02 ±.051)
.020 ±.002
(0.51 ±.051)
20
(0.51 ±.05)
10
(0.25)
25
16
40
61
0505
.050 ±.002
(1.27 ± .051)
.050 ±.002
(1.27 ±.051)
25
(0.64 ±.05)
15
(0.38)
10
7
100
153
0603
.060 ±.002
(1.52 ±.051)
.030 ±.002
(.76 ±.051)
25
(0.64 ±.05)
15
(0.38)
20
13
50
76
0805
.080 ±.002
(2.03 ±.051)
.050 ±.002
(1.27 ±.051)
40
(1.02 ±.05)
20
(0.51)
10
7
100
153
1005
.100 ±.002
(2.54 ±.051)
.050 ±.002
(1.27 ±.051)
40
(1.02 ±.05)
20
(0.51)
13
8
77
122
1020
.100 ±.002
(2.54 ±.051)
.200 ±.002
(5.08 ±.051)
40
(1.02 ±.05)
20
(0.51)
3
2
320
508
1111
.110 ±.002
(2.79 ±.051)
.110 ±.002
(2.79 ±.051)
40
(1.02 ±.05)
20
(0.51)
7
4
153
240
2010
.195 ±.010
(4.95 ±.254)
.095 ±.010
(2.41 ±.254)
60
(1.52 ±.05)
30
(0.77)
10
6
100
159
2525
.240 ±.010
(6.10 ±.254)
.250 ±.010
(6.35 ±.254)
60
(1.52 ±.05)
40
(1.02)
4
3
240
380
3725
.370 ±.010
(9.40 ±.254)
.245 ±.010
(6.22 ±.254)
60
(1.52 ±.05)
50
(1.27)
6
4
160
254
3737
.365 ±.010
(9.27 ±.254)
.375 ±.010
(9.53 ±.254)
60
(1.52 ±.05)
50
(1.27)
4
3
240
380
AlN
BeO
AlN
BeO
Available
Configurations
Style
W
E
W
E
W
E
W
E
W
E
W
E
W
E
W
E
W
E
W
E
W
E
W
E
Termination
Y
S
Y
S
Y
S
Y
S
Y
S
Y
S
Y
S
Y
S
S
S
S
S
S
S
S
S
inches (mm)
Note: Thermal conductivity is normalized to chip size. All values are approximate. Consult factory for extended thermal conductivity options.
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i c s .c o m
ATC Q-BRIDGE THERMAL CONDUCTOR
Capacitance
Case Size
0302
0402
0505
0603
0805
1005
Part Number
Capacitance (pF)
QB0302A20WY
QB0302A20ES
QB0302B20WY
QB0302B20ES
QB0402A20WY
QB0402A20ES
QB0402B20WY
QB0402B20ES
QB0505A25WY
QB0505A25ES
QB0505B25WY
QB0505B25ES
QB0603A25WY
QB0603A25ES
QB0603B25WY
QB0603B25ES
QB0805A40WY
QB0805A40ES
QB0805B40WY
QB0805B40ES
QB1005A40WY
QB1005A40ES
QB1005B40WY
QB1005B40ES
0.039
0.011
0.028
0.006
0.028
0.018
0.025
0.009
0.070
0.032
0.061
0.027
0.035
0.007
0.029
0.007
0.081
0.018
0.055
0.015
0.046
0.008
0.038
0.007
Case Size
1020
1111
2010
2525
3725
3737
Part Number
Capacitance (pF)
QB1020A40WY
QB1020A40ES
QB1020B40WY
QB1020B40ES
QB1111A40WY
QB1111A40ES
QB1111B40WY
QB1111B40ES
QB2010A60WS
QB2010A60ES
QB2010B60WS
QB2010B60ES
QB2525A60WS
QB2525A60ES
QB2525B60WS
QB2525B60ES
QB3725A60WS
QB3725A60ES
QB3725B60WS
QB3725B60ES
QB3737A60WS
QB3737A60ES
QB3737B60WS
QB3737B60ES
0.204
0.121
0.158
0.092
0.096
0.042
0.078
0.031
0.070
0.042
0.055
0.086
0.156
0.114
0.122
0.075
0.105
0.076
0.080
0.058
0.164
0.130
0.126
0.099
ATC Part Number Code
QB
0603 A 25
W
Y
T
Packaging
T = Tape and Reel, std.
1000 pc., 7” Reel
500 pc., 7” Reel
C = ATC Matrix Tray
Q-Bridge
Case Size
Substrate
A = AlN; B = BeO
Termination Code
Y = Silver Platinum
Non-Magnetic Termination
S = Silver over Magnetic Termination
Thickness (mils)
Style: W = Edge Wrap; E = No Wrap
The above part number refers to a Q-Bridge, (EIA case size 0603), Aluminum Nitride (AlN) substrate, Thickness 25 mils.,
Style W, Y Termination (Silver Platinum Non-Magnetic Termination), with Tape and Reel Packaging.
ATC accepts orders for our parts using designations with or without the “ATC” prefix. Both
methods of defining the part number are equivalent, i.e., part numbers referenced with the
“ATC” prefix are interchangeable to parts referenced without the “ATC” prefix. Customers are
free to use either in specifying or procuring parts from American Technical Ceramics.
For additional information and catalogs contact your ATC
representative or call direct at +1-631-622-4700.
Consult factory for additional performance data.
Sales of ATC products are subject to the terms and conditions contained in American Technical Ceramics Corp. Terms and Conditions of Sale (ATC document #001-992). Copies of these terms and
conditions will be provided upon request. They may also be viewed on ATC’s website at www.atceramics.com/productfinder/default.asp. Click on the link for Terms and Conditions of Sale.
ATC has made every effort to have this information as accurate as possible. However, no responsibility is assumed by ATC for its use, nor for any infringements of rights of third parties which may
result from its use. ATC reserves the right to revise the content or modify its product line without prior notice.
© 2015 American Technical Ceramics Corp. All Rights Reserved.
3
ATC # 001-1143, Rev. I, 4/20
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