一种精度可调的贴片式NTC热敏电阻
By setting surface electrode groups on the substrate and adjusting the resistance value using laser etching technology, the dispersion problem of surface-mount NTC thermistors is solved, achieving higher resistance accuracy and meeting the precision requirements of consumer electronics and semiconductor chips.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 东莞可锐电子科技有限公司
- Filing Date
- 2025-08-15
- Publication Date
- 2026-07-17
AI Technical Summary
Existing surface-mount NTC thermistors have difficulty controlling their resistance to within 0.5% after sintering, resulting in dispersion issues and failing to meet the refined power consumption control requirements of consumer electronics and semiconductor chips.
A surface electrode group is disposed on the upper substrate and/or the lower substrate. The resistance value of the surface electrode group is adjusted by laser etching to form a parallel structure to adjust the overall resistance value. The design of the left and right surface electrodes is included to achieve fine adjustment.
This technology enables the improvement of resistance accuracy to within 0.5% through post-sintering resistance adjustment, solving the dispersion problem and meeting the demand for higher resistance accuracy.
Smart Images
Figure CN224519603U_ABST
Abstract
Claims
1. A precision-adjustable surface-mount NTC thermistor, comprising an upper substrate (1), a lower substrate (2), an intermediate dielectric layer (3), and intermediate electrodes (4) distributed on the upper and lower sides of the intermediate dielectric layer (3), characterized in that: It also includes at least one surface electrode group (5) disposed on the upper substrate (1) and / or the lower substrate (2), and end electrodes (6) disposed on the left and right sides of the upper substrate (1) and the lower substrate (2), respectively. Each of the surface electrode groups (5) includes a left surface electrode (51) and a right surface electrode (52). The left surface electrode (51) and the right surface electrode (52) respectively include an electrode end (511), an electrode vertical portion (512), and multiple electrode horizontal portions (513). The left surface electrode (51) and the right surface electrode (52) are respectively connected through the electrode end (511). The horizontal portions (513) of each electrode in the same left surface electrode (51) or right surface electrode (52) are connected to the middle electrode (4) and are spaced apart in the front-back direction. The horizontal portions (513) of each electrode in the same left surface electrode (51) or right surface electrode (52) are connected to the electrode end (511) through the electrode vertical portion (512). The horizontal portions (513) of each electrode in the left surface electrode (51) correspond one-to-one with the horizontal portions (513) of each electrode in the right surface electrode (52) and are arranged side by side and spaced apart in the left-right direction.
2. The precision-adjustable chip NTC thermistor according to claim 1, characterized in that: The left surface electrode (51) and the right surface electrode (52) located in the same surface electrode group (5) are arranged symmetrically.
3. The precision-adjustable chip NTC thermistor according to claim 2, characterized in that: The transverse portions (513) of each electrode located on the same left surface electrode (51) or right surface electrode (52) have the same width, the same thickness, and different lengths. The width direction of the transverse portion (513) is the front-back direction, the thickness direction of the transverse portion (513) is the up-down direction, and the length direction of the transverse portion (513) is the left-right direction.
4. The precision-adjustable chip NTC thermistor according to claim 3, characterized in that: The length of the transverse portion (513) of each electrode located in the same left surface electrode (51) or right surface electrode (52) gradually decreases from front to back.
5. The precision-adjustable chip NTC thermistor according to claim 4, characterized in that: The length difference between each pair of adjacent transverse portions (513) of the same left surface electrode (51) or right surface electrode (52) is the same.
6. The precision-adjustable chip NTC thermistor according to claim 1, characterized in that: The transverse portions (513) of each electrode located in the same left surface electrode (51) or right surface electrode (52) are arranged parallel to each other in the front-back direction and are spaced at the same intervals.