Abstract
A novel microfabricated, all-electrical measurement platform is presented for a direct, accurate and rapid determination of the thermal conductivity and diffusivity of liquid and solid materials. The measurement approach is based on the bidirectional 3-omega method. The platform is composed of glass substrates on which sensor structures and a very thin dielectric nanolaminate passivation layer are fabricated. Using through-glass vias for contacting the sensors from the chip back side leaves the top side of the platform free for deposition, manipulation and optical inspection of the sample during 3-omega measurements. The thin passivation layer, which is deposited by atomic layer deposition on the platform surface, provides superior chemical resistance and allows for the measurement of electrically conductive samples, while maintaining the conditions for a simple thermal analysis. We demonstrate the measurement of thermal conductivities of borosilicate glass, pure water, glycerol, 2-propanol, PDMS, cured epoxy, and heat-sink compounds. The results compare well with both literature values and values obtained with the steady-state divided bar method. Small sample volumes (∼0.02 mm³) suffice for accurate measurements using the platform, allowing rapid temperature-dependent measurements of thermal properties, which can be useful for the development, optimization and quality testing of many materials, such as liquids, gels, pastes and solids.
| Original language | English |
|---|---|
| Pages (from-to) | 33-42 |
| Number of pages | 10 |
| Journal | Sensors and Actuators A: Physical |
| Volume | 278 |
| DOIs | |
| Publication status | Published - 1 Aug 2018 |
| MoE publication type | A1 Journal article-refereed |
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Keywords
- thermal sensors
- bidirectional 3-omega method;
- thermal characterization platform
- thermal conductivity
- thermal diffusivity
- microfabrication
- atomic layer deposition (ALD)
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Microfabricated sensor platform with through-glass vias for bidirectional 3-omega thermal characterization of solid and liquid samples. / Grosse, Corinna (Corresponding Author); Ras, Mohamad Abo; Varpula, Aapo; Grigoras, Kestutis; May, Daniel; Wunderle, Bernhard; Chapuis, Pierre-Olivier; Gomès, Séverine; Prunnila, Mika.
In: Sensors and Actuators A: Physical, Vol. 278, 01.08.2018, p. 33-42.Research output: Contribution to journal › Article › Scientific › peer-review
TY - JOUR
T1 - Microfabricated sensor platform with through-glass vias for bidirectional 3-omega thermal characterization of solid and liquid samples
AU - Grosse, Corinna
AU - Ras, Mohamad Abo
AU - Varpula, Aapo
AU - Grigoras, Kestutis
AU - May, Daniel
AU - Wunderle, Bernhard
AU - Chapuis, Pierre-Olivier
AU - Gomès, Séverine
AU - Prunnila, Mika
N1 - Project: 100846
PY - 2018/8/1
Y1 - 2018/8/1
N2 - A novel microfabricated, all-electrical measurement platform is presented for a direct, accurate and rapid determination of the thermal conductivity and diffusivity of liquid and solid materials. The measurement approach is based on the bidirectional 3-omega method. The platform is composed of glass substrates on which sensor structures and a very thin dielectric nanolaminate passivation layer are fabricated. Using through-glass vias for contacting the sensors from the chip back side leaves the top side of the platform free for deposition, manipulation and optical inspection of the sample during 3-omega measurements. The thin passivation layer, which is deposited by atomic layer deposition on the platform surface, provides superior chemical resistance and allows for the measurement of electrically conductive samples, while maintaining the conditions for a simple thermal analysis. We demonstrate the measurement of thermal conductivities of borosilicate glass, pure water, glycerol, 2-propanol, PDMS, cured epoxy, and heat-sink compounds. The results compare well with both literature values and values obtained with the steady-state divided bar method. Small sample volumes (∼0.02 mm³) suffice for accurate measurements using the platform, allowing rapid temperature-dependent measurements of thermal properties, which can be useful for the development, optimization and quality testing of many materials, such as liquids, gels, pastes and solids.
AB - A novel microfabricated, all-electrical measurement platform is presented for a direct, accurate and rapid determination of the thermal conductivity and diffusivity of liquid and solid materials. The measurement approach is based on the bidirectional 3-omega method. The platform is composed of glass substrates on which sensor structures and a very thin dielectric nanolaminate passivation layer are fabricated. Using through-glass vias for contacting the sensors from the chip back side leaves the top side of the platform free for deposition, manipulation and optical inspection of the sample during 3-omega measurements. The thin passivation layer, which is deposited by atomic layer deposition on the platform surface, provides superior chemical resistance and allows for the measurement of electrically conductive samples, while maintaining the conditions for a simple thermal analysis. We demonstrate the measurement of thermal conductivities of borosilicate glass, pure water, glycerol, 2-propanol, PDMS, cured epoxy, and heat-sink compounds. The results compare well with both literature values and values obtained with the steady-state divided bar method. Small sample volumes (∼0.02 mm³) suffice for accurate measurements using the platform, allowing rapid temperature-dependent measurements of thermal properties, which can be useful for the development, optimization and quality testing of many materials, such as liquids, gels, pastes and solids.
KW - thermal sensors
KW - bidirectional 3-omega method;
KW - thermal characterization platform
KW - thermal conductivity
KW - thermal diffusivity
KW - microfabrication
KW - atomic layer deposition (ALD)
UR - http://www.scopus.com/inward/record.url?scp=85048816339&partnerID=8YFLogxK
U2 - 10.1016/j.sna.2018.05.030
DO - 10.1016/j.sna.2018.05.030
M3 - Article
AN - SCOPUS:85048816339
VL - 278
SP - 33
EP - 42
JO - Sensors and Actuators A: Physical
JF - Sensors and Actuators A: Physical
SN - 0924-4247
ER -