Thermoelectric micromodules

Since 2005 incorporated in Ferrotec Corporation (Japan)

SCTB NORD is the leading company
in development and manufacturing
of thermoelectric products

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Thermoelectric microcoolers are usually singled out as a separate class not only by their dimensions (normally ≤10×10 mm) and the used dices dimensions (≤0.85×0.85 mm), but also in relation to special requirements for their applications.

Peltier microcoolers are applied for thermal stabilization of miniature objects such as solid-state lasers featuring high-density heat flows (up to 20 W /cm²). Besides, some applications of these modules, for example, telecommunications, specify high reliability requirements. The standard most frequently applied to determining reliability of Peltier micromodules is the Telcordia reliability control program.

SCTB NORD has a complete set of equipment to implement this reliability control program for high-volume output of micromodules.

Quality control of modules manufactured by SCTB NORD meets the Quality Assurance - internal quality standard which regulates all the intermediate and final inspection and testing operations.

Given below are some design and technological features representing the idea of SCTB NORD's thermoelectric module production capabilities:

Ceramic substrates - Al₂O₃ or AlN
Nonmetallized external surface; external surface metallization with Cu-Ni-Au on one side (Т version) or on two sides (ТТ version)

Various types of solders on the external metallization of modules (pretinning):

Solder type	Melting point temperature, °C
Sn-In	112
Bi-Sn	139
In-Ag	143
Sn-In-Ag	175
Sn-Pb	183
Sn-Sb	230

Peltier module assembly solder - Sn-Sb (Т_melt ≈230^оC), Au-Sn (Т_melt ≈280^оC)
Thermoelectric modules are soldered with rosin fluxes or in influxless environment
At the customer's request, terminals may be made from tinned or insulated wire or in the form of posts
Soldering quality is assured by gold plating of all soldering surfaces, both of the ceramic substrates and semiconductor dices
The washing line provides for 6-stage ultrasonic washing in different solvents and detergents that ensure perfect cleanliness of modules
Peltier cooler may be installed in standard package

Peltier micromodules Peltier micromodule two stage in package

SCTB NORD manufactures a wide range of Peltier micromodules, including those for use in TOSA (Transmitter Оptical Sub-Assembly).

The table given below shows some types of manufactured modules.

Single-stage Peltier micromodules

The required module types are selected from the General Specification or from the table given below, based on the marking ТМ-ААА-ВВ-СС, where:

TM - thermoelectric module
AAA - number of thermocouples
BB - dices cross section, mm
CC - current at maximum temperature difference ΔT, А

Thermoelectric micromodule design versions

Peltier micromodule Peltier micromodule porch version

Thermoelectric micromodule batterfly version Thermoelectric micromodule posts version

TYPE	PERFORMANCE GRAPHS	BASIC CHARACTERISTICS				DIMENSIONS, mm
TYPE	PERFORMANCE GRAPHS	Imax, A	Umax, V	Qcmax, W	DTmax, * °C	A	B	C	Height
TM-7-0.3-0.3		0.3	0.8	0.15	72	2.0	2.0	3.0	1.79
TM-8-0.3-0.3		0.3	0.9	0.15	72	2.0	2.0	3.0	1.79
TM-2-0.3-0.5		0.5	0.23	0.07	72	1.2	1.2	1.5	1.5
TM-11-0.4-1.1		1.1	1.26	0.88	72	6.4	2.4	6.4	1.65
TM-4-0.6-1.2		1.2	0.5	0.32	72	2.0	4.0	4.0	2.6
TM-8-0.6-1.2		1.2	0.9	0.65	72	4.0	4.0	6.0	2.6
TM-12-0.6-1.2		1.2	1.4	1.0	72	4.0	6.0	6.0	2.6
TM-18-0.6-1.2		1.2	2.1	1.5	72	6.0	6.0	8.1	2.6
TM-32-0.6-1.2		1.2	3.7	2.6	72	8.0	8.0	10.0	2.6
TM-18-0.4-1.4		1.4	2.1	1.6	72	3.8	3.8	5.0	1.15
TM-4-0.6-1.5		1.5	0.5	0.4	72	2.0	4.0	4.0	2.3
TM-8-0.6-1.5		1.5	0.9	0.8	72	4.0	4.0	6.0	2.3
TM-12-0.6-1.5		1.5	1.4	1.3	72	4.0	6.0	6.0	2.3
TM-18-0.6-1.5	download	1.5	2.1	1.9	72	6.0	6.0	8.1	2.65
TM-32-0.6-1.5		1.5	3.7	3.3	72	8.0	8.0	10.0	2.6
TM-30-0.7-1.8	download new	1.8	3.4	4.0	73	6.2	10.3	15.4	2.2
TM-8-0.5-2.0		2.0	0.9	1.1	72	4.0	4.0	5.0	1.0
TM-18-0.6-2.0		2.0	2.1	2.5	72	6.0	6.0	7.2	1.65
TM-23-0.6-2.0		2.0	2.6	3.1	72	6.0	8.2	8.2	1.65
TM-29-0.6-2.0	download new	2.0	3.3	4.3	73	6.0	10.2	10.2	1.65
TM-47-0.6-2.0		2.0	5.4	6.5	72	8.0	12.0	12.0	1.6
TM-79-0.6-2.0		2.0	9.1	10.9	72	10.0	15.0	15.0	1.57
TM-32-0.6-2.2		2.2	3.7	4.7	72	8.0	10.0	10.0	2.58
TM-18-0.6-2.4		2.4	2.1	2.8	72	6.0	6.0	7.2	1.65
TM-29-0.6-2.4		2.4	3.3	4.6	72	6.0	10.2	10.2	1.65
TM-41-0.6-2.4		2.4	4.7	6.5	72	6.0	14.0	14.0	1.65
TM-119-0.6-2.4		2.4	13.7	18.9	72	10.0	24.0	24.0	1.65
TM-7-1.0-2.5		2.5	0.8	1.3	72	8.0	8.0	10.0	4.2
TM-35-0.7-2.8		2.8	4.0	7.0	72	6.0	12.2	12.2	1.7
TM-2-0.4-3.0		3.0	0.23	0.67	72	2.5	1.5	2.5	1.0
TM-7-1.0-3.0		3.0	0.8	1.5	72	8.0	8.0	10.0	3.8
TM-7-1.0-3.9		3.9	0.8	1.9	72	8.0	8.0	10.0	3.6
TM-95-0.6-3.9		3.9	10.9	22	72	12.0	16.0	16.0	1.65
TM-26-0.8-4.8		4.8	3.0	8.1	72	8.0	12.0	12.0	1.65
TM-29-0.8-4.8		4.8	3.3	9.0	72	8.0	12.2	12.2	1.65
TM-39-0.8-6.0		5.9	4.5	14.5	72	6.9	15.1	15.1	1.65

I_max - current consumption at maximum temperature difference (ΔT_max), A
U_max - voltage supplied at maximum temperature difference (ΔT_max), V
Q_cmax - maximum cooling capacity at I_max and ΔT = 0 °C, W
ΔT_max - maximum temperature difference at I_maх and Q_c = 0, °C

*At the module hot side temperature Т_hot=50 ^°С ΔT_max rises to 82-83 ^°C

Two stage micromodules

The required module types are selected from the General Specification or from the table given below, based on the marking Х ТМ-ААА-ВВ-ССМ, where:

Х - number of stages in a thermoelectric module
TM - thermoelectric module
AAA - number of thermocouples in the first module stage
BB - number of thermocouples in the second module stage
CC - current at maximum temperature difference ΔT, А

Two stage micromodules design versions

Thermoelectric micromodule two stage Peltier micromodule two stage with porch

TYPE	PERFORMANCE GRAPHS	BASIC CHARACTERISTICS				DIMENSIONS, mm
TYPE	PERFORMANCE GRAPHS	Imax, A	Umax, V	Qcmax, W	DTmax, °C	Cold side A x B	Hot side C x D	Height
2TM-29-10-0.4	download	0.4	3.6	0.42	99	4.8 x 4.8	6.4 x 6.4	4.7
2TM-29-10-0.5		0.5	3.6	0.52	98	4.8 x 4.8	6.4 x 6.4	4.1
2TM-29-10-0.6		0.6	3.6	0.57	98	4.8 x 4.8	6.4 x 6.4	4.0
2TM-11-4-1.2		1.3	2.0	0.46	97	2.0 x 2.0	6.0 x 6.0	4.0
2TM-17-4-1.3		1.3	2.0	0.54	102	2.0 x 2.0	8.0 x 6.0	4.0
2TM-31-8-1.3		1.3	3.6	1.05	101	4.0 x 4.0	10.0 x 8.0	4.0
2TM-31-12-1.2		1.3	3.7	1.35	96	4.0 x 4.0	10.0 x 8.0	4.0
2TM-59-18-1.3		1.3	7.0	2.24	99	6.0 x 6.0	12.0 x 12.0	4.0
2TM-11-4-1.5		1.5	1.3	0.55	96	2.0 x 4.0	6.0 x 6.0	3.6
2TM-17-4-1.6		1.6	2.0	0.63	102	2.0 x 4.0	8.0 x 6.0	3.6
2TM-31-8-1.6		1.6	3.6	1.24	101	4.0 x 4.0	10.0 x 8.0	3.6
2TM-31-12-1.4		1.4	3.2	1.59	95	1.0 x 6.0	10.0 x 8.0	3.6
2TM-59-18-1.5		1.5	7.0	2.64	98	6.0 x 6.0	12.0 x 12.0	3.6
2TM-11-4-1.8		1.8	1.3	0.66	94	2.0 x 4.0	6.0 x 6.0	3.2
2TM-17-4-2.0		2.0	2.0	0.78	100	2.0 x 4.0	8.0 x 6.0	3.2
2TM-31-8-1.9		1.9	3.6	1.51	99	4.0 x 4.0	10.0 x 8.0	3.2
2TM-31-12-1.7		1.7	3.7	1.93	93	4.0 x 6.0	10.0 x 8.0	3.2
2TM-59-18-1.9		1.9	7.0	3.22	97	6.0 x 6.0	12.0 x 12.0	3.2
2TM-11-4-2.3		2.3	1.3	0.84	92	2.0 x 4.0	6.0 x 6.0	2.8
2TM-17-4-2.5		2.5	2.0	1.0	98	2.0 x 4.0	8.0 x 6.0	2.8
2TM-31-8-2.5		2.5	3.6	1.93	97	4.0 x 4.0	10.0 x 8.0	2.8
2TM-31-12-2.3		2.3	3.7	2.48	91	4.0 x 6.0	10.0 x 8.0	2.8
2TM-59-18-2.4		2.4	7.0	4.11	95	6.0 x 6.0	12.0 x 12.0	2.8
2TM-11-4-2.7		2.7	1.3	0.98	91	2.0 x 4.0	6.0 x 6.0	2.6
2TM-17-4-2.9		2.9	2.0	1.15	98	2.0 x 4.0	8.0 x 6.0	2.6
2TM-31-8-2.9		2.9	3.6	2.25	95	4.0 x 4.0	10.0 x 8.0	2.6
2TM-31-12-2.6		2.6	3.7	2.66	90	4.0 x 6.0	10.0 x 8.0	2.6
2TM-59-18-2.9		2.9	7.0	4.80	93	6.0 x 6.0	12.0 x 12.0	2.6