What is CSP Package and CSP LED Chip?
Posted on 09.12.2016
With the development of LED lighting and
customer requirements, LED chip continue to improve and innovate. While people
have higher requirement on led chip size and performance, CSP chip some in
appropriate time and match the requirement. CSP package has several new
advantages, no substrate, free solder wire, small size and high optical density.
CSP = Chip Scale Package
a CSP LED is defined as a LED package with a size equivalent to a LED chip, or
no larger than 20%. The package product also has comprehensive component
What is the difference on CSP package?
While we manufacture SMD, led chips will be
placed on holder and connected to PCB board by alloy wire. LED chip get power
from PCB board and light up, current go through the alloy wire. During use, the
alloy wire will be consumed, high surge current or too much heat will result in
alloy wire burned. That is the reason why led bulb broken. CSP chip can be
directly applied to the PCB board, effectively shortening the heat flow path to
the substrate, reducing the thermal resistance of the light source. Under same
current, CSP chip has higher intensity and lower current consumed compared to
SMD Chip. Besides, CSP package don’t need holder and alloy wire, that means we
can reduce two production processes, which reducing the probability of making
defective products, the broken risk during use is also reduced.
Compared to traditional 2835 SMD, or the
popular flip 2835 SMD now, CSP chip is small size but high intensity volume per
unit with less heat value, it is ideal for application in automotive led light.
Now automotive led light manufacturers use CSP chip to simulate the length of
the tungsten filament in halogen bulb, created a wonderful light beam like
halogen bulbs. This technology is popular to used on developing automotive led
All in all, we can summarize the advantages
of CSP chips,
Better heat dissipation
Higher lumen under same current
compared to SMD
No holder and alloy wire, less
production processes, more reliable
High package density
(From Philips Lumileds report)