Patent Publication Number: US-2019186969-A1

Title: Sensing device and method for manufacturing the same

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This non-provisional application claims priority under 35 U.S.C. § 119(a) on Patent Application No(s). 106144565 filed in Taiwan, R.O.C. on Dec. 19, 2017, the entire contents of which are hereby incorporated by reference. 
     TECHNICAL FIELD 
     The disclosure relates to a sensing device and method for manufacturing the same, more particularly to a sensing device, capable of improving sensing effect by rising temperature, and a method for manufacturing the same. 
     BACKGROUND 
     When a sensor is in operation, its sensing component needs properly heated in order to increase the sensitivity and reduce the reaction time. Therefore, some sensors are additionally equipped with a heater around the sensing component to raise the temperature of the sensing component. 
     SUMMARY 
     One embodiment of the disclosure provides a sensing device including a supporting member, a thermal resistance portion, a sensing unit and a heating unit. The supporting member has a supporting surface. The thermal resistance portion is located within the supporting member, wherein a thermal conductivity of the thermal resistance portion is less than a thermal conductivity of the supporting member. The sensing unit is disposed on the supporting surface. The heating unit is disposed on the supporting surface, wherein the heating unit is configured to heat the sensing unit, and an orthogonal projection of the heating unit on the supporting surface overlaps an orthogonal projection of the thermal resistance portion on the supporting surface. 
     One embodiment of the disclosure provides a method for manufacturing a sensing device, the method includes: forming a thermal resistance portion within a supporting member, wherein a thermal conductivity of the thermal resistance portion is less than a thermal conductivity of the supporting member; disposing a sensing unit on a supporting surface of the supporting member; and disposing a heating unit on the supporting surface of the supporting member, wherein the heating unit is configured to heat the sensing unit, and an orthogonal projection of the heating unit on the supporting surface overlaps an orthogonal projection of the thermal resistance portion on the supporting surface. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The present disclosure will become better understood from the detailed description given hereinbelow and the accompanying drawings which are given by way of illustration only and thus are not intending to limit the present disclosure and wherein: 
         FIG. 1  is a cross-sectional side view of a sensing device according to one embodiment of the disclosure; 
         FIGS. 2-5  show a method for manufacturing the sensing device in  FIG. 1 ; 
         FIG. 6  is a cross-sectional side view of a sensing device according to another embodiment of the disclosure; 
         FIG. 7  is a cross-sectional side view of a sensing device according to yet another embodiment of the disclosure; 
         FIG. 8  is a cross-sectional side view of a sensing device according to still another embodiment of the disclosure; 
         FIG. 9  is a cross-sectional side view of a sensing device according to yet still another embodiment of the disclosure; and 
         FIG. 10  is a cross-sectional side view of a sensing device according to further another embodiment of the disclosure. 
     
    
    
     DETAILED DESCRIPTION 
     In the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the disclosed embodiments. It will be apparent, however, that one or more embodiments may be practiced without these specific details. In other instances, well-known main structures and devices are schematically shown in order to simplify the drawing. 
     In addition, the terms used in the present disclosure, such as technical and scientific terms, have its own meanings and can be comprehended by those skilled in the art, unless the terms are additionally defined in the present disclosure. That is, the terms used in the following paragraphs should be read on the meaning commonly used in the related fields and will not be overly explained, unless the terms have a specific meaning in the present disclosure. Furthermore, in order to simplify the drawings, some conventional structures and components are drawn in a simplified manner to keep the drawings clean. 
     Moreover, the size, ratio and angle of the components in the drawings of the present disclosure may be exaggerated for illustrative purposes, but the present disclosure is not limited thereto, and various modifications can be made without departing from the spirit of the present disclosure. 
     Please refer to  FIG. 1  which is a cross-sectional side view of a sensing device according to one embodiment of the disclosure. This embodiment provides a sensing device  1  that includes a supporting member  11 , a thermal resistance portion  12 , a plurality of sensing units  13  and a heating unit  14 . 
     The supporting member  11  includes a substrate  111 , an isolation layer  112 , a passivation layer  113  and a sealer  114 . The substrate  111  has a recess  111   a . The isolation layer  112  is stacked on the substrate  111 . The passivation layer  113  is stacked on the isolation layer  112 . The supporting member  11  has a supporting surface  110  on the side of the passivation layer  113  facing away from the isolation layer  112 . The substrate  111  and the isolation layer  112  surround the thermal resistance portion  12  at the recess  111   a , such that the thermal resistance portion  12  is located within the supporting member  11 . The supporting member  11  has a through hole  11   a  connected to the thermal resistance portion  12 . The sealer  114  is disposed in the through hole  11   a . The thermal resistance portion  12  has a thermal conductivity less than a mean thermal conductivity or the minimum thermal conductivity of the supporting member  11 . The mean thermal conductivity of the supporting member is determined by the weighted mean of the thermal conductivities of the materials contained in the supporting member. The minimum thermal conductivity of the supporting member means is the thermal conductivity of the material with the lowest thermal conductivity of all materials contained in the supporting member. The isolation layer  112  is taken as an interface for the substrate  111 , and it is made of, for example, silicon dioxide, nitric oxide, glass material, or ceramic material. In comparing the supporting member  11  and the other components, the passivation layer  113  is made of semiconductor material having a relatively low thermal conductivity, a relatively low coefficient of thermal expansion and a relatively high elastic modulus or made of ceramic material having a high degree of hardness. 
     In this embodiment, the recess  111   a  has a depth D 1  and a width W 1  in a ratio of 2:1, but the present disclosure is not limited thereto. In addition, in this embodiment, due to the sealer  114  being disposed in the through hole  11   a , the thermal resistance portion  12  becomes a sealed chamber, and the thermal conductivity of the thermal resistance portion  12  is approximately the same as that of a vacuum environment or an almost vacuum environment, but the present is not limited thereto. In some other embodiments, the supporting member may have no sealer  114 ; in such a case, the thermal resistance portion  12  would become an open chamber, and the thermal conductivity of the thermal resistance portion  12  would be the same as that of the environment. Furthermore, in this embodiment, the through hole  11   a  penetrates through the substrate  111  and connects to the thermal resistance portion  12 , but the present disclosure is not limited thereto. In some other embodiments, the through hole  11   a  may further penetrate through the isolation layer  112  and the passivation layer  113 . 
     The sensing units  13  and the heating unit  14  are disposed on the supporting surface  110 . The heating unit  14  is able to heat the sensing units  13 . An orthogonal projection of the thermal resistance portion  12  on the supporting surface  110  overlaps an orthogonal projection of the heating unit  14  on the supporting surface  110 . However, the locations of the sensing units  13  and the heating unit  14  are not restricted. In some other embodiments, the sensing units  13  may be stacked on the heating unit  14 , such that the heating unit  14  may be located between the sensing units  13  and the supporting surface  110 . 
     The orthogonal projection of the thermal resistance portion  12  on the supporting surface  110  overlapping the orthogonal projection of the heating unit  14  on the supporting surface  110  is beneficial to slow down the heat transfer between the heating unit  14  and the supporting member  11 . Therefore, heat generated by the heating unit  14  has higher likelihood to be transferred to the sensing units  13  in order to maintain the temperature of the sensing units  13 . As a result, the desired function of the sensing units  13  can be maintained with a less power consumption of the heating unit  14 . 
     Please refer to  FIG. 1  and further refer to  FIGS. 2-5 .  FIGS. 2-5  show a method for manufacturing the sensing device in  FIG. 1 . The method of manufacturing the sensing device  1  includes the following steps. 
     As shown in  FIG. 2 , the recess  111   a  of the substrate  111  of the supporting member  11  is formed by, for example, etching. The ratio of the depth D 1  to the width W 1  may be less than 2:1. The recess  111   a  is filled with a volatile substance  121 . The isolation layer  112  is stacked on the substrate  111  and the volatile substance  121 . When stacking the isolation layer  112  on the substrate  111  and the volatile substance  121 , the volatile substance  121  is in solid form. Then, the passivation layer  113  is stacked on the isolation layer  112 . The supporting surface  110  of the supporting member  11  is on the side of the passivation layer  113  facing away from the isolation layer  112 . The sensing units  13  and the heating unit  14  are disposed on the supporting surface  110  of the supporting member  11 , allowing the heating unit  14  to heat the sensing units  13 , and the orthogonal projection of the heating unit  14  on the supporting surface  110  to overlap the orthogonal projection of the recess  111   a  on the supporting surface  110 . 
     Then, as shown in  FIG. 3 , the through hole  11   a  which penetrates through the substrate  111  and connects to the recess  111   a  is formed in the supporting member  11 , but the present disclosure is not limited thereto. In some other embodiments, the through hole may further penetrate through the isolation layer  112  and the passivation layer  113 . Then, by heating, the volatile substance  121  is volatilized away from the substrate  111  through the through hole  11   a , such that the thermal resistance portion  12 , which is located within the supporting member  11  and surrounded by the substrate  111  and the isolation layer  112 , is formed at the recess  111   a . At this moment, the thermal resistance portion  12  is an open chamber, and the thermal conductivity of the thermal resistance portion  12  is the same as that of air in the environment and less than the mean thermal conductivity or the minimum thermal conductivity of the supporting member  11 . 
     Then, as shown in  FIG. 4 , the sealer  114  is formed to seal the through hole  11   a  in a vacuum environment or an almost vacuum environment. The material of the sealer  114  is gradually accumulated on an inner surface of the through hole  11   a  at one end and then seals the through hole  11   a . As this moment, the thermal resistance portion  12  becomes a sealed chamber, and the thermal conductivity of the thermal resistance portion  12  would be approximately the same as that of a vacuum environment or an almost vacuum environment and less than the mean thermal conductivity or the minimum thermal conductivity of the supporting member  11 . In addition, a part of the sealer  114  is located in the through hole  11   a , and the other part of the sealer  114  is located outside the through hole  11   a . The thickness of the part of the sealer  114  located outside the through hole  11   a  is approximately two times the thickness of the part of the sealer  114  located in the through hole  11   a , but the present disclosure is not limited thereto. 
     Then, as shown in  FIG. 5 , the part of the sealer  114  located outside the through hole  11   a  is flattened; for example, as shown in  FIG. 1 , the part of the sealer  114  located outside the through hole  11   a  is removed, remaining the part of the sealer  114  located in the through hole  11   a.    
     Please refer to  FIGS. 1 and 6 .  FIG. 6  is a cross-sectional side view of a sensing device according to another embodiment of the disclosure. The method of manufacturing the sensing device  1  in  FIGS. 1 and 6  is similar to that in  FIGS. 1 to 5 , so it will not be repeated again. In this embodiment, the method of manufacturing the sensing device  1  includes the following steps. 
     As shown in  FIG. 6 , the recess  111   a  is formed in the substrate  111  of the supporting member  11 . The through hole  11   a  connected to the recess  111   a  is formed in the substrate  111  of the supporting member  11 . The volatile substance  121  is filled in the recess  111   a ; alternately, the volatile substance  121  is filled in the recess  111   a  and a part of the through hole  11   a ; or the volatile substance  121  is filled in the recess  111   a  and the whole through hole  11   a . The isolation layer  112  is stacked on the substrate  111  and the volatile substance  121 . The passivation layer  113  is stacked on the isolation layer  112 . The supporting surface  110  of the supporting member  11  is formed on the side of the passivation layer  113  facing away from the isolation layer  112 . The sensing units  13  and the heating unit  14  for heating the sensing units  13  are disposed on the supporting surface  110  of the supporting member  11 . The orthogonal projection of the heating unit  14  on the supporting surface  110  overlaps the orthogonal projection of the recess  111   a  on the supporting surface  110 . 
     Then, by heating, the volatile substance  121  is volatilized away from the substrate  111  through the through hole  11   a , such that the thermal resistance portion  12 , which is located within the supporting member  11  and surrounded by the substrate  111  and the isolation layer  112 , is formed at the recess  111   a . At this moment, the thermal resistance portion  12  is an open chamber, and the thermal conductivity of the thermal resistance portion  12  is the same as that of air in the environment and less than the mean thermal conductivity or the minimum thermal conductivity of the supporting member  11 . 
     Then, as shown in  FIG. 4 , the sealer  114  is formed to seal the through hole  11   a  in a vacuum environment or an almost vacuum environment. As this moment, the thermal resistance portion  12  becomes a sealed chamber, and the thermal conductivity of the thermal resistance portion  12  would be approximately the same as that of the vacuum environment or the almost vacuum environment and less than the mean thermal conductivity or the minimum thermal conductivity of the supporting member  11 . Then, as shown in, the part of the sealer  114  located outside the through hole  11   a  is flattened; for example, as shown in  FIG. 1 , the part of the sealer  114  located outside the through hole  11   a  is removed, remaining the part of the sealer  114  in the through hole  11   a.    
     Please refer to  FIG. 7  which is a cross-sectional side view of a sensing device according to yet another embodiment of the disclosure. This embodiment provides a sensing device  2  which includes a supporting member  21 , a thermal resistance portion  22 , a sensing unit  23 , a heating unit  24  and a planarization layer  25 . 
     The supporting member  21  includes a substrate  211 , an isolation layer  212  and a passivation layer  213 . The substrate  211  has a recess  211   a . The thermal resistance portion  22  is filled in the recess  211   a . The isolation layer  212  is stacked on the substrate  211  and the thermal resistance portion  22 . The passivation layer  213  is stacked on the isolation layer  212 . The supporting member  21  has a supporting surface  210  on a side of the passivation layer  213  facing away from the isolation layer  212 . The substrate  211  and the isolation layer  212  surround the thermal resistance portion  22  at the recess  211   a , such that the thermal resistance portion  22  is located within the supporting member  21 . The thermal resistance portion  22  may be made of a solid or liquid material which contracts (or expands) slowly; in this embodiment, the thermal conductivity of the thermal resistance portion  22  is less than a mean thermal conductivity or the minimum thermal conductivity of the supporting member  21 . For example, the thermal conductivity of the thermal resistance portion may be equal to or less than 150 W/(m·K). In this embodiment, the recess  211   a  has a depth D 2  and a width W 2  in a ratio equal to or less than 2:1, but the present disclosure is not limited thereto. 
     In addition, the heating unit  24  is disposed on the supporting surface  210  and located above the thermal resistance portion  22 , such that an orthogonal projection of the thermal resistance portion  22  on the supporting surface  210  overlaps an orthogonal projection of the heating unit  24  on the supporting surface  210 . The planarization layer  25  is stacked on the heating unit  24  and the supporting surface  210 . The sensing unit  23  is disposed on the planarization layer  25  and located above the heating unit  24 , such that the heating unit  24  is able to heat the sensing unit  23 . 
     In this embodiment, the sensing unit  23  is stacked on the heating unit  24 , such that the heating unit  24  is located between the sensing unit  23  and the supporting surface  210 , but the present disclosure is not limited thereto. In some other embodiments, the sensing unit  23  may be stacked on the supporting surface  210  as the heating unit  24  does. 
     The method of manufacturing the sensing device  2  includes the following steps. 
     The recess  211   a  is formed in the substrate  211  of the supporting member  21 . The recess  211   a  is filled with the thermal resistance portion  22 . The isolation layer  212  is stacked on the substrate  211  and the thermal resistance portion  22 . The passivation layer  213  is stacked on the isolation layer  212 . The heating unit  24  is disposed on the supporting surface  210  of the passivation layer  213  of the supporting member  21 . The orthogonal projection of the heating unit  24  on the supporting surface  210  overlaps the orthogonal projection of the thermal resistance portion  22  on the supporting surface  210 . The planarization layer  25  is stacked on the heating unit  24  and the supporting surface  210 . The sensing unit  23  is stacked on the planarization layer  25 , such that the heating unit  24  is able to heat the sensing unit  23 . 
     Please refer to  FIG. 8  which is a cross-sectional side view of a sensing device according to still another embodiment of the disclosure. This embodiment provides a sensing device  3  which includes a supporting member  31 , a thermal resistance portion  32 , a plurality of sensing units  33  and a heating unit  34 . 
     The supporting member  31  includes a substrate  311 , an isolation layer  312  and a passivation layer  313 . The substrate  311  has a plurality of recesses  311   a . Each recess  311   a  has a depth D 3  and a width W 3  in a ratio equal to or greater than 10:1. The isolation layer  312  is stacked on the substrate  311 . The passivation layer  313  is stacked on the isolation layer  312 . The supporting member  31  has a supporting surface  310  on a side of the passivation layer  313  facing away from the isolation layer  312 . The recesses  311   a  surrounded by the substrate  311  and the isolation layer  312  become a thermal resistance portion  32  located within the supporting member  31 . In such a case, the thermal resistance portion  32  is consisted of a plurality of sealed chambers. The thermal conductivity of the thermal resistance portion  32  is approximately the same as that of a vacuum environment or an almost vacuum environment and is less than a mean thermal conductivity or the minimum thermal conductivity of the supporting member  31 . 
     In addition, the sensing units  33  and the heating unit  34  are disposed on the supporting surface  310 , such that an orthogonal projection of the heating unit  34  on the supporting surface  310  overlaps an orthogonal projection of the thermal resistance portion  32  on the supporting surface  310 . The heating unit  34  is disposed at a position capable of heating the sensing units  33 , but the distance therebetween is not particularly restricted. 
     The method of manufacturing the sensing device  3  includes the following steps. 
     A plurality of recesses  311   a  are formed in the substrate  311  of the supporting member  31 . Each recess  311   a  has the depth D 3  and the width W 3  in a ratio equal to or greater than 10:1. 
     The isolation layer  312  is stacked on the substrate  311 , such that the recesses  311   a  are surrounded and sealed by the substrate  311  and the isolation layer  312  to become the thermal resistance portion  32 . The isolation layer  312  may be disposed on the substrate  311  by a process of Physical Vapor Deposition (PVD) or Chemical Vapor Deposition (CVD), but the process for forming the isolation layer  312  is not restricted. The deposition rate of the isolation layer  312  onto the substrate  311  is equal to or greater than, for example, 30 Å/sec. By doing so, the material of the isolation layer  312  would not enter the recesses  311   a , such that the recess  311   a  are maintained sealed. In some cases, there are approximately less than 15% of the space in each recess  311   a  being occupied by the isolation layer  312 . 
     The passivation layer  313  is stacked on the isolation layer  312 . The sensing units  33  and the heating unit  34  are disposed on the supporting surface  310  of the passivation layer  313  of the supporting member  31 . An orthogonal projection of the heating unit  34  on the supporting surface  310  overlaps an orthogonal projection of the thermal resistance portion  32  on the supporting surface  310 . The heating unit  34  is disposed at a position capable of heating the sensing units  33 , but the distance therebetween is not particularly restricted. 
     Please refer to  FIG. 9  which is a cross-sectional side view of a sensing device according to yet still another embodiment of the disclosure. This embodiment provides a sensing device  4  which includes a supporting member  41 , a thermal resistance portion  42 , a plurality of sensing units  43  and a heating unit  44 . 
     The supporting member  41  includes a substrate  411 , an isolation layer  412  and a passivation layer  413 . The substrate  411  has a recess  411   a . The isolation layer  412  is stacked on the substrate  411  and in contact with an inner surface of the recess  411   a . The thermal resistance portion  42  is filled into the recess  411   a , and the thermal resistance portion  42  and the substrate  411  are separated by the isolation layer  412 . The passivation layer  413  is stacked on the isolation layer  412  and the thermal resistance portion  42 . The supporting member  41  has a supporting surface  410  on a side of the passivation layer  413  facing away from the isolation layer  412 . The thermal resistance portion  42  in the recess  411   a  are surrounded by the isolation layer  412  and the passivation layer  413 , such that the thermal resistance portion  42  is located within the supporting member  41 . The thermal resistance portion  42  may be made of a solid or liquid material which contracts (or expands) slowly; in this embodiment, the thermal conductivity of the thermal resistance portion  42  is less than a mean thermal conductivity or the minimum thermal conductivity of the supporting member  41 . For example, the thermal conductivity of the thermal resistance portion may be equal to or less than 150 W/(m·K). In this embodiment, the recess  411   a  has a depth D 4  and a width W 4  in a ratio equal to or less than 5:1, but the present disclosure is not limited thereto. 
     In addition, the sensing units  43  and the heating unit  44  are disposed on the supporting surface  410 , and an orthogonal projection of the heating unit  44  on the supporting surface  410  overlaps an orthogonal projection of the thermal resistance portion  42  on the supporting surface  410 . The heating unit  44  is disposed at a position capable of heating the sensing units  43 , but the distance therebetween is not particularly restricted. 
     The method of manufacturing the sensing device  4  includes the following steps. 
     The recess  411   a  is formed on the substrate  411  of the supporting member  41 , and the recess  411   a  has the depth D 4  and the width W 4  in a ratio equal to or less than 5:1. The isolation layer  412  is stacked on the substrate  411  and the inner surface of the recess  411   a . The recess  411   a  is filled with the thermal resistance portion  42 , and the thermal resistance portion  42  and the substrate  411  are separated by the isolation layer  412 . The passivation layer  413  is stacked on the isolation layer  412  and the thermal resistance portion  42 . The sensing units  43  and the heating unit  44  are disposed on the supporting surface  410  of the passivation layer  413  of the supporting member  41 . The orthogonal projection of the heating unit  44  on the supporting surface  410  overlaps the orthogonal projection of the thermal resistance portion  42  on the supporting surface  410 . The heating unit  44  is disposed at a position capable of heating the sensing units  43 , but the distance therebetween is not particularly restricted. 
     Please refer to  FIG. 10  which is a cross-sectional side view of a sensing device according to further another embodiment of the disclosure. This embodiment provides a sensing device  5  which includes a supporting member  51 , a thermal resistance portion  52 , a plurality of sensing units  53  and a heating unit  54 . 
     The supporting member  51  includes a substrate  511 , an isolation layer  512  and a passivation layer  513 . The substrate  511  has a plurality of recesses  511   a . Each recess  511   a  has a depth D 5  and a width W 5  in a ratio ranging from 6:1 to 9:1. The isolation layer  512  is stacked on the substrate  511  and in contact with an inner surface of each recess  511   a . The passivation layer  513  is stacked on the isolation layer  512 . The part of the passivation layer  513  in the recess  511   a  form a plurality of sealed chambers, and these sealed chambers become a thermal resistance portion  52 . That is, the thermal resistance portion  52  is located within the supporting member  51 , and the thermal resistance portion  52  is consisted of a plurality of sealed chambers. The supporting member  51  has a supporting surface  510  on a side of the passivation layer  513  facing away from the isolation layer  512 . The thermal conductivity of the thermal resistance portion  52  is approximately the same as that of a vacuum environment or an almost vacuum environment and is less than a mean thermal conductivity or the minimum thermal conductivity of the supporting member  51 . 
     In addition, the sensing units  53  and the heating unit  54  are disposed on the supporting surface  510 , an orthogonal projection of the heating unit  54  on the supporting surface  510  overlaps an orthogonal projection of the thermal resistance portion  52  on the supporting surface  510 . The heating unit  54  is disposed at a position capable of heating the sensing units  53 , but the distance therebetween is not particularly restricted. 
     The method of manufacturing the sensing device  5  includes the following steps. 
     The recesses  511   a  are formed on the substrate  511  of the supporting member  51 . Each recess  511   a  has the depth D 5  and the width W 5  in a ratio ranging from 6:1 to 9:1. 
     The isolation layer  512  is stacked on the substrate  511  and in contact with the inner surface of each recess  511   a . The passivation layer  513  is stacked on the isolation layer  512 . A part of the passivation layer  513  is in the recesses  511   a , but each recess  511   a  is not fully filled with the passivation layer  513  so as to form the recesses  511   a  that each is a sealed chamber. Therefore, the recesses  511   a  become a thermal resistance portion  52 . The isolation layer  512  is formed on the substrate  511  by a process of Atomic Layer Deposition (ALD), but the process for forming the isolation layer  512  is not restricted. The passivation layer  513  is formed on the isolation layer  512  by a process of Physical Vapor Deposition (PVD) or Chemical Vapor Deposition (CVD), but the process for forming the passivation layer  513  is not restricted. A deposition rate of the isolation layer  512  onto the substrate  511  is equal to or less than 10 Å/sec. A deposition rate of the passivation layer  513  onto the isolation layer  512  is equal to or greater than 30 Å/sec. By doing so, the isolation layer  512  is able to fully cover the inner surface of each recess  511   a , the material of the passivation layer  513  would not enter the recesses  511   a , such that the recesses  511   a  are maintained sealed. In some cases, there are approximately less 60% of the space in each recess  511   a , excluding the isolation layer  512 , being occupied by the passivation layer  513 . 
     The sensing units  53  and the heating unit  54  are disposed on the supporting surface  510  of the passivation layer  513  of the supporting member  51 . The orthogonal projection of the heating unit  54  on the supporting surface  510  overlaps the orthogonal projection of the thermal resistance portion  52  on the supporting surface  510 . The heating unit  54  is disposed at a position capable of heating the sensing units  53 , but the distance therebetween is not particularly restricted. 
     According to the sensing device and method for manufacturing the same as discussed in above, the orthogonal projection of the thermal resistance portion on the supporting surface overlapping the orthogonal projection of the heating unit on the supporting surface is beneficial to slow down the heat transfer between the heating unit and the supporting member. Therefore, it is possible to maintain the temperature of the sensing unit which is heated by the heating unit, and to reduce the energy consumption of the heating unit while maintaining the sensing effect of the sensing unit. That is, the temperature of the sensing unit can be raised in an efficient manner, such that the desired function of the sensing unit can be maintained with a less power consumption of the heating unit. 
     It will be apparent to those skilled in the art that various modifications and variations can be made to the present disclosure. It is intended that the specification and examples be considered as exemplary embodiments only, with a scope of the disclosure being indicated by the following claims and their equivalents.