Winbond Electronics Corporation

Yi-Der Wu

Yu-Hsuan Ho

Yu-Ming Chen

A particle sensing device, including a substrate and at least one particle sensing element, is provided. The substrate has a groove, and a through hole is disposed at a bottom of the groove. The through hole penetrates a bottom of the substrate. The particle sensing element is disposed in the substrate. The particle sensing element may include a first electrode pair and a second electrode pair. Two first sub-electrodes of the first electrode pair are disposed nearby two sides of the groove, respectively. And, a first distance is provided between the two first sub-electrodes. Two second sub-electrodes of the second electrode pair are disposed nearby two sides of the groove, respectively. And, a second distance is provided between the two second sub-electrodes. The first distance is smaller than the second distance.

Particle sensing device and electronic apparatus having the same

A manufacturing method of a circuit board includes: performing a first printing process to form a first insulating layer having a first circuit depressed pattern; performing a second printing process to form a first circuit layer in the first circuit depressed pattern; checking whether a real position of the first circuit layer is diverged from a predetermined position; determining whether the shift level of the position of the first circuit layer is more than a predetermined level; performing the first printing process to form the second insulating layer, wherein when the shift level is more than the predetermined level and the thickness of a second insulating layer to be formed on the first insulating layer is not greater than a tolerance thickness, the second insulating layer has a hole at least partially overlapping the real position; and performing the second printing process to form a conductive plug in the hole.

Manufacturing method of circuit board

A particle sensing device, which senses a particulate matter by using a light beam from a light source, is provided. The particle sensing device includes a columnar array and a light-sensing element. The columnar array is disposed at a downstream side of a traveling path of the light beam. The columnar array has a plurality of columnar objects. A gap is existed between two adjacent columnar objects. The light-sensing element is disposed opposite to the columnar array and at a downstream side of a traveling path of the light beam. Wherein, the traveling path of the light beam is parallel with a length direction of each columnar object. And, the light beam passes through the gap for arriving at the light-sensing element. The particle sensing device can sense the particulate matter satisfactorily and can be simply integrated into various electronic apparatuses.

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Taichung, Taiwan

Yi-Der Wu