# PLEDM

> type of memory chip

**Wikidata**: [Q7119616](https://www.wikidata.org/wiki/Q7119616)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/PLEDM)  
**Source**: https://4ort.xyz/entity/pledm

## Summary
PLEDM (Phase-state Low Electron (hole)-number Drive Memory) is a type of volatile semiconductor memory chip developed by Hitachi in 1999. It requires constant power to retain stored data, aligning it with the characteristics of volatile memory. As a subclass of semiconductor memory, PLEDM represents an innovation in data storage solutions for electronic devices.

## Key Facts
- Developed by Hitachi in 1999.
- Full name: Phase-state Low Electron (hole)-number Drive Memory.
- Classified as a volatile memory, requiring power to maintain stored information.
- Subclass of semiconductor memory, a broader category of data storage devices.
- Documented in an archived Hitachi R&D page (2007) and discontinued Microsoft Academic ID: 2781091722.
- Wikipedia title: "PLEDM," with English-language documentation.
- Sitelink count: 1, indicating limited but specific online references.

## FAQs
### Q: What does PLEDM stand for?
A: PLEDM stands for Phase-state Low Electron (hole)-number Drive Memory, reflecting its operational mechanism as a semiconductor memory technology.

### Q: Is PLEDM volatile or non-volatile?
A: PLEDM is a type of volatile memory, meaning it loses stored data when power is interrupted.

### Q: Who developed PLEDM?
A: PLEDM was developed by Hitachi, with documented inception in 1999.

## Why It Matters
PLEDM holds significance as a specialized semiconductor memory technology designed for applications requiring temporary data storage. Developed by Hitachi in 1999, it contributed to advancements in volatile memory solutions, addressing the need for efficient, power-dependent data retention in electronic systems. As a distinct subclass of semiconductor memory, PLEDM exemplifies targeted innovation in the semiconductor industry, particularly during the late 1990s. Its development underscores the ongoing pursuit of optimized memory technologies for computing and electronics, even if its adoption or long-term impact remains niche compared to mainstream memory types like DRAM or SRAM.

## Notable For
- **Phase-state electron drive mechanism**: Unique operational principle distinguishing it from other memory technologies.
- **Hitachi innovation**: Product of Hitachi’s R&D efforts in semiconductor memory, documented in archival records.
- **1999 inception**: Represents late 20th-century advancements in volatile memory design.
- **Specialized classification**: Explicitly categorized as both volatile memory and a semiconductor memory subclass.

## Body

### Overview
PLEDM is a semiconductor memory technology developed by Hitachi in 1999. Its full name, Phase-state Low Electron (hole)-number Drive Memory, highlights its technical basis in manipulating electron states for data storage.

### Development Context
- **Developer**: Hitachi, a major Japanese conglomerate with significant contributions to semiconductor research.
- **Inception**: 1999, reflecting the era’s focus on optimizing memory technologies for emerging digital systems.
- **Documentation**: Key details archived via a Hitachi R&D webpage (2007) and referenced in discontinued academic databases.

### Technical Classification
- **Volatile Memory**: PLEDM retains data only while powered, a defining trait of volatile memory systems.
- **Semiconductor Memory Subclass**: Part of a broader category of electronic data storage devices, emphasizing its integration into semiconductor-based systems.

### Specifications and Legacy
- **Aliases**: No widely recognized alternate names beyond its full technical designation.
- **Sitelink and Reference Activity**: Limited to English Wikipedia documentation and a single archived corporate reference, indicating niche recognition.
- **Discontinued Identifier**: Microsoft Academic ID 2781091722, reflecting historical cataloging in academic research databases.