The Human Development Index (HDI) is a statistic composite index of life expectancy, education (mean years of schooling completed and expected years of schooling upon entering the education system), and per capita income indicators, which is used to rank countries into four tiers of human development. A country scores a higher level of HDI when the lifespan is higher, the education level is higher, and the gross national income GNI (PPP) per capita is higher.
Another meaning is High Density Interconnect.
In the industrial/industry context, "HDI" generally refers to "High Density Interconnect". This refers to a type of printed circuit board (PCB) that allows for a higher density of electronic components to be packed into a smaller area.
Examples of applications of HDI technology include:
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Mobile devices: Smartphones and tablets require smaller and thinner PCBs to fit inside their compact designs, making HDI technology an important factor in their manufacture.
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Wearables: Smartwatches and other wearable devices also require small and thin PCBs, making HDI technology an essential component of their design.
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Medical equipment: Medical devices such as ultrasound machines and patient monitors also require compact and reliable PCBs that can withstand high levels of use and vibration.
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Automotive electronics: The use of HDI technology in automotive electronics can help reduce the overall size and weight of electronic systems, leading to improved fuel efficiency and reduced emissions.
Similar terms used in the industrial context include:
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PCB manufacturing: This refers to the process of producing printed circuit boards for use in electronic devices and systems.
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Electronic packaging: This includes the design and manufacture of packaging materials and methods for electronic components and devices, including PCBs.
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Microelectronics: This refers to the study and application of small-scale electronic components and systems, including HDI PCBs.
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Advanced manufacturing: This encompasses a range of innovative manufacturing techniques and technologies, including HDI PCB manufacturing, that are designed to improve efficiency and productivity in the manufacturing process.