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SMD 저항기 안내: 코드, 크기, 풋프린트 및 한계

SMD 저항기는 리드가 없는 직사각형 패키지의 고정값 저항기로, 구멍에 삽입하는 대신 인쇄회로기판 표면의 패드에 납땜됩니다. 일반적으로 기판에서 가장 수가 많은 부품이면서 데이터시트보다 관행에 따라 사양이 정해지는 경우가 가장 많은 부품이기도 합니다. 대부분의 안내 자료는…

동박 적층판(CCL): 유형, 제조, 성능 및 표준

동박적층판(CCL)은 PCB의 도체를 형성하는 기본 소재입니다. 구리박을 경화된 유리섬유 강화 에폭시, 유연한 고분자 필름 또는 금속 베이스의 열전도성 유전체와 같은 절연 소재에 접합해 만듭니다. 일반적인 다층 경성 PCB에서는 패턴이 형성된 CCL이 코어가 되는 경우가 많습니다.…

JLCPCB vs PCBWay: 프로젝트에 적합한 PCB 제조업체는? (2026)

For a straightforward PCB prototype or a small assembly order that fits JLCPCB’s Economic PCBA rules, start with JLCPCB, especially when the components are already in its inventory. For rigid-flex or extensive custom fabrication requirements, shortlist PCBWay early. These recommendations follow from JLCPCB’s economical assembly tier and PCBWay’s documented advanced manufacturing options. The JLCPCB vs…

GND란 무엇인가요? 의미, 종류 및 PCB 접지 설명

GND appears on almost every circuit diagram, PCB, power supply, and electronic module. It is often described as “zero volts” or “the negative terminal,” but neither description is universally correct. In electronics, GND stands for ground. It is the reference node against which other voltages are measured and, in many circuits, part of the path…

관통 구멍이란? PCB 유형, 용도 및 설계 가이드

A through hole is an opening that passes completely from one side of a printed circuit board (PCB) to the other. It may be plated with conductive copper to create an electrical connection, or left unplated for mechanical use. Through holes are commonly used for component leads, connectors, vias, mounting hardware, alignment pins, and slots.…

QFN 패키지란 무엇인가요? PCB 설계 및 조립을 위한 실용 가이드

QFN packages appear in everything from power supplies and wireless modules to sensors, microcontrollers, and automotive electronics. Their small footprint, short electrical paths, and efficient heat transfer make them an attractive alternative to larger leaded packages. However, the same underside connections that save space also make QFN footprint design, soldering, and inspection less forgiving. So,…

PCB 소재 가이드: 종류, 특성 및 선택

PCB material affects far more than the physical strength of a circuit board. It influences impedance, signal loss, heat dissipation, dimensional stability, assembly reliability, manufacturability, lead time, and cost. A material that works well for a basic controller may fail in a 77 GHz radar module, a high-current LED board, or a rigid-flex medical device.…

제어 임피던스 PCB 설계: 적층 구조, 사양 및 테스트

Controlled impedance is the practice of designing and manufacturing PCB traces so their characteristic impedance meets a specified target and tolerance. The result depends on the conductor geometry, dielectric construction, and reference planes. A complete requirement also states how the manufacturer will verify the finished structure. A note that says only “50 ohms” leaves important…

10k 저항기: 색상 코드, 용도 및 적합한 제품 선택 방법

A 10k resistor is a passive electrical component with a nominal resistance of 10,000 ohms (10kΩ). In modern circuit design, it is one of the most ubiquitous values found on breadboards and production PCBs alike. Engineers and hobbyists turn to 10k resistors because they hit an ideal electrical middle ground: they limit current to safe,…

PCB 안테나 설계: 레이아웃, 재료 및 제조

A PCB antenna is a copper trace or pattern etched directly onto a printed circuit board that transmits and receives radio frequency electromagnetic waves. It is the cheapest way to give a product wireless connectivity, because it adds no connector, no cable and no bill-of-materials line. It is also the part of a design most…

LED 애노드와 캐소드: 양극 및 음극 단자를 식별하는 방법

An LED (Light Emitting Diode) is a polarized semiconductor device that allows current to flow in only one direction. To illuminate an LED, you must connect its positive and negative terminals correctly within your circuit. On standard through-hole LEDs, the longer leg and the rounded side represent the anode, while the shorter leg and the…

0402 Resistors Guide: Size, Specs, and Selection

Hardware design always comes down to a battle for board space. As consumer wearables, IoT devices, and high-performance computing modules pack more features into smaller enclosures, printed circuit board (PCB) real estate has become an incredibly valuable commodity. Moving away from legacy through-hole parts and bulkier surface-mount devices (SMDs) is no longer optional—it is a…

IPC-TM-650 설명: PCB 시험 방법, 주요 절차 및 품질 활용

“Test to IPC” is not a complete PCB requirement. A supplier still needs the method, revision, samples, conditions, and acceptance criteria before it can quote or run the work. IPC-TM-650 is the procedure side of PCB testing. It helps engineers choose a way to measure a board characteristic. The governing specification, drawing, or contract still…

PCB 조립용 BOM: 깔끔한 PCBA BOM 작성 방법

A BOM for PCB assembly is more than a spreadsheet of parts. It is the sourcing and assembly control document that tells a PCBA manufacturer what to buy, what to populate, what to leave off, and which substitutions are allowed. If the BOM is unclear, the RFQ stalls before production ever starts. Many PCBA RFQ…

Gerber, BOM, CPL 및 적층 구조: 각 파일의 의미

Gerber, BOM, CPL, and stackup files tell a PCB manufacturer four different things. Gerber files define the board layers. The BOM defines components. The CPL defines placement. The stackup defines layer construction, materials, copper, dielectric thickness, and impedance assumptions. Many PCBA quote delays happen before production starts. Why? The factory may have board data, but…

PCBA 견적에 필요한 파일은 무엇인가요?

A PCBA quote needs more than Gerber files. For an accurate PCB assembly quotation, send Gerber files, drill files, BOM, CPL, stackup if needed, quantity, lead-time target, and test requirements. These files tell the manufacturer what to fabricate, what to source, where to place parts, and how the finished board should be accepted. If those…

인쇄 회로 기판 조립 공정: 단계별 가이드

턴키 PCBA 제조 완벽 가이드

PCB 라미네이트 선택을 위한 FR-4 재료 특성

The FR-4 material properties that matter most depend on what your PCB must withstand: electrical signals, assembly heat, operating temperatures, voltage stress, moisture, and mechanical loading. Start with dielectric constant and loss, thermal expansion and stability, insulation performance, and mechanical requirements. FR-4 is a flame-retardant, glass-reinforced epoxy material class. It does not identify one fixed…

PCB 열 핫스팟 맵: 시뮬레이션 및 설계 수정

A PCB thermal hotspot map helps engineers find where heat concentrates before it becomes drift, derating, solder fatigue, or field failure. Instead of treating thermal review as a late-stage check, the map turns temperature into layout evidence: which packages, copper areas, vias, planes, and airflow routes carry the thermal load. For PCB engineers, the value…