3D laser trimming technology for regulating embedded thick-film carbon resistors on a random access memory module

Li, Chun-Hao; Tsai, Ming‐Jong

doi:10.1016/j.jmatprotec.2008.04.054

Cited by 8 publications

(1 citation statement)

References 10 publications

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“…According to the resistor ranking mentioned above, all the embedded resistors were third grade components, except for the smallest size one, wherein resistors with length 4.90 mm and width beyond 4.00 mm were located in the required range of second grade. Hence, as expected for second grade components, extra laser trimming must be provided to modify the geometries to the small size resistors (Li and Tsai, 2009). …”

Section: Resultsmentioning

confidence: 99%

Effects of MnSO₄ on microstructure and electrical resistance properties of electroless Ni−P thin-films and its application in embedded resistor inside PCB

Zhou

Chen²,

et al. 2014

Circuit World

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Purpose -Nickel phosphorus (NiZP) thin-films have been electrolessly deposited in an acid-plating bath with the addition of manganese sulfate monohydrate (MSM) to achieve higher resistance for the application of embedded resistor with value beyond 10 KV. As this material is being used for fabricating embedded resistors under the addition of MSM, its resistance properties including effects of MSM concentration and plating time on resistances, temperature coefficient of resistance (TCR), and resistance tolerance of embedded resistor were investigated. The paper aims to discuss these issues. Design/methodology/approach -The structure of fabricated NiZP film was detected by means of scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The properties of substrate, including the surface morphologies, glass transition process and boundary of copper pad and substrate surface, were performed by SEM, dynamic mechanical analysis and optical microscope, respectively. The resistance tolerances of embedded resistors were elaborated from the cases of NiZP thin-film resistance tolerance and the size effects of resistors, respectively. Findings -The fabricated film was found to be constructed with numerous NiZP amorphous nanoparticles, which was believed to be the reason of increasing thin-film resistance. The NiZP thin-films presented over one magnitude order of resistance increasing in the case of MSM concentration varied from 0 to 40 g/L. For the case of TCRs, NiZP thin-films deposited with 20 g/L MSM exhibited low TCRs of within^100 ppm/8C Before TR at temperature elevating from 40 to 1608C, indicating that this NiZP thin-film belongs to the constant TCR materials according to the military standard. For the tolerance of embedded resistor, the tolerance contributed by NiZP thin-film was obtained to be 9.8 percent, whereas the geometry tolerances were in the range of 0-20 percent according to the geometries of embedded resistor. Originality/value -For NiZP thin-film without MSM, its low resistance with around 100 ohm/sq. limit the values of resistor few KV and restricted its widespread application of embedded resistor with higher resistance beyond 10 KV. The authors introduced MnSO 4 in NiZP electroless plating process to improve the low resistance of NiZP thin-film. The resistance was increased over one order of magnitude after added with 40 g/L MnSO 4 . Due to the specific structure, as this material is being used for fabricating embedded resistors, the electrical properties and its application properties to verify its appliance in embedded resistor were systematically investigated by means of SEM, TEM, XRD characterizations, TCRs, resistance tolerance analysis, respectively.

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Section: Resultsmentioning

confidence: 99%

Effects of MnSO₄ on microstructure and electrical resistance properties of electroless Ni−P thin-films and its application in embedded resistor inside PCB

Zhou

Chen²,

et al. 2014

Circuit World

View full text Add to dashboard Cite

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Embedded thin film resistors fabricated by alkaline electroless deposition

Wang¹,

Cui²,

Wang³

2015

J Mater Sci: Mater Electron

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Chemically integrated nickel-based resistors on printed circuits and its resistance precisely controlled

Zhou

Zhang

Yan

et al. 2021

J Mater Sci: Mater Electron

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3D laser trimming technology for regulating embedded thick-film carbon resistors on a random access memory module

Cited by 8 publications

References 10 publications

Effects of MnSO₄ on microstructure and electrical resistance properties of electroless Ni−P thin-films and its application in embedded resistor inside PCB

Effects of MnSO₄ on microstructure and electrical resistance properties of electroless Ni−P thin-films and its application in embedded resistor inside PCB

Embedded thin film resistors fabricated by alkaline electroless deposition

Chemically integrated nickel-based resistors on printed circuits and its resistance precisely controlled

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3D laser trimming technology for regulating embedded thick-film carbon resistors on a random access memory module

Cited by 8 publications

References 10 publications

Effects of MnSO4 on microstructure and electrical resistance properties of electroless Ni−P thin-films and its application in embedded resistor inside PCB

Effects of MnSO4 on microstructure and electrical resistance properties of electroless Ni−P thin-films and its application in embedded resistor inside PCB

Embedded thin film resistors fabricated by alkaline electroless deposition

Chemically integrated nickel-based resistors on printed circuits and its resistance precisely controlled

Contact Info

Product

Resources

About

Effects of MnSO₄ on microstructure and electrical resistance properties of electroless Ni−P thin-films and its application in embedded resistor inside PCB

Effects of MnSO₄ on microstructure and electrical resistance properties of electroless Ni−P thin-films and its application in embedded resistor inside PCB